Yes, not talking about WP8. Windows 10 universal apps are supposed to run on PC and phone without any changes and have the UI adapt according to the device its running on, so any universal app available now on the PC should be the same version that runs on the phone when Win 10 mobile is released. That was the whole pitch of Windows 10 so we should be able to look at a current Windows 10 universal app and compare it to other platforms. There really shouldn't be a need to wait for Win 10 mobile if their implementation of universal apps is as they claim.
The office mobile apps are an example. They were first on ios and android and now have been released for Windows 10 and when mobile comes it should be the same version. Same applies to outlook, groove or any other universal app. The UI will adapt and possibly display things differently but the functionality should be the same so its valid to compare what's in Windows 10 now with Microsoft's apps on other platforms.