I hope you don't regret buying now - the 12 series will likely have 120hz (done properly). Apple have an upgrade program, though you have to make 11 payments before you can change phones iirc.
Still planning on the 12 but got this to keep me going. I'd prefer the larger Max given the choice but bought this second hand off a chap in the MM - so will almost certainly get the larger version of the 12.
A day with the 11 has also made me realise it's not just the camera Samsung do all their image enhancing nonsense with. The display on the S20 (and my S8+) was a lot more vivid (not necessarily in a good way, just had more pop) but the 11 is far more natural. Funny that Samsung go to all that length and Apple don't even give you an option to make the display more vivid!
Basically they've both got their pros and cons but being a purist Apple have won me over.