I'm plagued with this dilemma daily. The problem is there is no 12" Android tablet with Active Stylus. I feel the note pro 12.2" is just so well done there is no real competitor at this point. I have had the iPad Pro 12, Note pro 12.2 and Tab Pro S 12". The iPad Pro is nice, but I do not like how fragile it is and I don't like iOS because it does not sync my Mobile Legends progress with Android. IOS is very restrictive and does not have the useability freatures I need. I also dont like how thin and fragile the ipad pro is, the Note Pro is built like a rugged business machine, and can survive drops. The iPad Pro is lightning fast, but not as fast as the iphone 7+. The Tab Pro S is full windows, I really like the tablet, the design is superb and uses USB C, the AMOLED display is awesome. However I don't like it because the pen integration is good, but definitely not S-Pen calibur. Also it runs windows, which is inferior to android. It's better for Multitasking and office products, but Android power management, mobility and ease of use is better. Windows sleep drains power still and is just not as optimized for touch. the Tab Pro S does not lag and the screen looks so beautiful.
Ultimately I sold my SM-P905V by verizon and bought the Wifi only SM-P900 model because the verizon version comes with a locked bootloader. I have flashed new tablet software which makes it feel like a galaxy Tab S2 or S3. I could just get the Tab S3, it is fast and has a beautiful display, but I can't deal with a 9.7" display, I love the 12" display even though the technology isnt as good. So it came down to functionality, for what I use it for, taking notes, browsing the web, and watching videos on the go, this was the best solution. I can't stand the lag on the Note Pro 12.2” though - I own a Pixel C for gaming the benchmarks dont compare. There is lag in everything from the homescreen, to ebay, to games. Pixel C is 100k while this tablet does 37k on Antutu. For word editing I use Google Docs, which isn't as good as word, I can't really do excel work on the Note 12.2, which works great on the Tab Pro S. I have a little lag, but there really is not a replacement for my use case; which is a professional note taking tablet.