Experts, right. Let me know when the almighty iphone can record sound in directional Dolby digital, videos in 4K (upcoming), wirelessly charge or expand its storage. All these features the 1520 has over the iphone will be ignored by your "experts" but every teeny iphone feature is claimed to be "revolutionary". Sorry, the iphone is way less advanced than the 1520, and not better in any way when viewed objectively.
I'll admit that no phone is perfect and the 1520 will obviously have advantages over an iPhone.
But all in all, experts weigh the pros and cons of devices to come out with what devices are better.
The iPhone may not have 4K nor the same sound quality you would find on a 1520 but does the 1520 have 1080p 60 FPS recording or 720p 240 FPS slow-mo? And according to actual tests it has been shown that the iPhone beats the 1520 in camera quality, despite having a lower resolution camera. Oh and does 1520 have phase detection autofocus?
http://www.phonearena.com/reviews/C...-LG-G3-Lumia-1520-Xperia-Z2-HTC-One-M8_id3805
In addition to this, last year's iPhone 5S beat the Lumia 1520's processor in benchmarks and real time, so obviously the iPhone 6 beats it as well.
http://m.windowscentral.com/benchmark-lumia-1520-and-iphone-5s-win
Plus another revolutionary thing about the iPhone is the SOC. On paper it seems like a simple 1.3 GHz processor but it performs like a beast, it doesn't throttle and Cyclone-enhanced (Apple's *custom architecture) is solid and about 3 years ahead of the competition.
All Qualcom SoCs throttle, because of the high clock speeds on big.LITTLE architecture. What is still dumbfounding is that even the most obsessive spec warriors can't discern what lower clock, smaller core number beating higher clock, larger core number means..
Also Apple has taken steps to ensure that games on iOS look even more stunning with the new Metal API, also a step ahead of Windows Phone.
I'm not an iSheep, but I'll give credit where credit it due and I would definitely prefer an iPhone 6 over a 1520, and most experts would too and they would have logical reasons for doing so.