iPhone user since 4s and iPad user for many years (mini for pilot) and Pro 12.9 for daily use.
I preordered the S9 Ultra to try it out for ***** and gigs. I AM BLOWN AWAY at the S9 Ultra. For what I use the iPad/Tablet for on a daily basis the s9 Ultra is by far the superior tablet. The screen is absolutely stunning, the s-pen actually writes well, the multi-tasking is actually really nice, the Dex (I did not think I would use Dec), but damn its actually a nice feature to have. I purchased a small foldable keyboard with small stand to pair with theSs9 Ultra and with Dex it's much better than the 12.9 Pro.
The only negative so far is the seamless transition from iPhone, to iPad, and my Mac. It's not as convenient, but I am sure I will get over it eventually as I plan on trading in my 12.9 Pro for the S9 Ultra. Also I am most likely trading in my 13 Pro Max for the S24 Ultra early 2024.
(EDIT: Also no 5G support for the S9 Ultra which sucks, but I guess I will use my phone hotspot or by a used Verizon hotspot since I am already paying for the line.)
The only Apple device will be my Mac and I'm not leaving that anytime soon.