Xiaomi 15 ultra vs vivo x200 ultra

Hi.. can anyone guide me here. I'm out looking for a new phone. I currently have a s10+ and want the absolute best phone out there in particular best camera. I had zeroed myself on xiaomi 15 ultra and must have watched all videos related to it on YouTube! But the recent rumor of possible vivo x200 uktra launch in india, puts me in a dilemma - whether to wait for vivo x200 ultra in india or go ahead with xiaomi 15 ultra. I think I also read somewhere in gsm post that news that india launch may still not happen and it may remain China exclusive.

I don't want to wait till April -May only to know launch may never take place (india) and if then if I buy xiaomi 15 ultra I would lose out on pre book offer as well.. Specs wise xiaomi 15 ultra is the only phone this year which has gonna both- 1 inch main sensor and a 200mp telephoto. That sounds very tempting atleast on paper. I'm not such a technical person to fully understand and appreciate vivo's move for going for 35 mm(main camera) and 1.28" sensor. I'm not sure how that focal length would look, the details etc. Maybe it's good for human subjects but what about other scenarios.. So even if vivo x200 ultra gonna launch in india I'm not sure whether that's the best implementation since they are dropping 1 inch sensor.. Xiaomi on other hand downgraded their main camera (by dropping variable aperture) as well as the ultrwide camera.. infact their photos this year don't look so contrasty which was their usp.. I prefer 15 ultra to vivo x200 pro so not so confused regarding that.