... ... I am partially a WP user. During work days from monday till friday, i will often be carrying 3 BBs along, one sim-less 9860, a Z10 with personal line, and lastly a Z3 with company's sim.
U.I. wise, i would say BB OS10 is slightly better than WP tilings.
Currently with 10.3.1 there will be a activity page when you swipe from idle screensaver. Here you can see what are the apps or functions that are in idle or in process. WP wise, you can only see the activated functions or apps executing in the background by press and hold the back icon. What BB provides here, is a quick access to the executed apps or to kill the process immediately. WP access and closing is an additional step to go.
Organizing and grouping of apps and functions i a tad bit different from both OSes. Yes, both can group common stuffs/apps into a file by press and hold an icon and moving it to another. For WP, this is only possible when you have created a shortcut on the quick access front page. For BB, such categorization can be done straight into the apps/function page by swiping from right to left. However there's another added categorizing trick which i employed on all my OS10 BB. That's by press and hold apps/funtion icon, and keep shifting to the new page which will be automatically created when i come to a new page. Compare to others, i have 4 pages of function access, grouped as according to Call and Connection, Media and Albums, Social Medias, and Miscellaneous tools. This is something which WP don't have, and perhaps not that an issue to minimalists...
General usage pattern, both OSes have their plus and minuses...
When click on the dialer icon, both OS shares the same issue for no ease of access to dial pad. On the BB, it goes straight to the recent calls log, while in WP, you face the rapid dial short cut, slide to the next page for the call log. For BB to access the dial pad, you'll have to click the short cut at the bottom right corner, while you have to look at the bottom of the WP screen for the dial pad access. BB's OS5 and OS7 allows us to customize where the function goes when th dialer icon was clicked. So, both WP and BB is not so... senior friendly especially to those who're not so "smart phone" savvy.
On both OS, after you have keyed a mobile number on the dial pad, you cannot go further like immediate SMS/MMS except dialing or saving of number into contact record. BB OS5 nd OS7 have such straight option to do the texting or media sending function access.
Texting and sending to multiple parties is about the same on both OSes. However, BB have a slighter winning edge for able to access contacts stored in the SIM card. There's no way you can send to a SIM contact thru WP.
It's a totally different experience you get from 2 OS when it comes to phonebook access. On WP, you may have quick access to contact by pressing on the alphabet, and all 26 alphabets displayed as short cuts. In BB, it's swiping and swiping up and down or keying of 1st or 2 or 3 of the characters of the contact for precise locating. However, BB have a slight winning edge over WP. You can choose to display either phone contact, sim contact, or both. In WP, we're stuck with just phone contact. The only way when we can access SIM contact, is by copying contact information from the SIM to phone. Privacy on contact exposure is quite weak if one misplaces his WP phone.
Onto the hardware... WP phones can be equally par with BBs... only if BBs' software are polished as good as WP.
If i'm to put both the LEAD and a perhaps a 830 together, the LEAD will be outshined by the LUMIA. At this price point, there's no need to bring out the Lumia 830 or even 930, just a new 640 will get attentions from gamers and shooters. BB's are not good with gaming, so as photography.
In photography, BB will tend to looses out to WP as well as Android makes which are backed with camera designed software to yield better capturing results. However, no matter is it a Lumia or a BB, in the setup, we cannot choose to tone down the pixel size. When it's 8mpx, it's 8mpx, fixed. To send a picture as an corporate email attachment which is only acceptable with limited file size, you will have to crop the captured image to a smaller size file. This is why i often carry an additional 9860 along, which i can set captured image into smaller file size without the need for post cropping. I can do macro shots on electronic components which i handled as well, OS10 just can't get the micro images clear no matter how i zoomed or shoot under strong light. WP have macro shots functionality in the settings, but the image capture will still be in a large file size. Not really that friendly in corporate mail exchange environment as well...
In gaming, when you do a search in youtube with various BB models, you'll see that some simple games are playable. Graphic intensive ones glows a little with WP makes, but suffers lots of image drops with BB models. I don't know does it have to do with smaller foot print with Win8.1 with 1GB ram. I just wouldn't expect the LEAP to play OverKill FPS as smooth as my weekender Lumia640 does.
Web browsing experience is much better on BB browser, when compared to WP's IE. When we opened alot of tabs with BB browser, a click to the bottom left on the search bar, slides out the shortcuts to the tabs which we opened for instant access. We're often brought to the new tab page with IE of WP, that it's kind of frustrating that we often have to click the tab page to choose the tab we're previously in... duh... I might as well install either Chrome or FireFox into WP for slightly better browsing experience.
Last but not least... Apps Apps Apps~~~
While Microsft apps market is growing with options, BB gets the boost with side loading capability with Android's .apk apps. While side loading of apps is smooth with the current OS10.3.1, there will be a little few that will not be compatible with the hidden Android system in BBOS. ... ...