Xiaomi 15 vs Vivo X300

So, I am currently using an iPhone 12 and have decided to leave Apple this year.

Since I like more compact phones, both the Xiaomi and Vivo have come up while doing my research.

I value camera quality and performance quite a lot and I have read differing opinions on which is better. The Vivo I believe does better zoom while I do like the Leica processing on the Xiaomi.

Both of these phones are at a similar price where I live so my question is simple: which one should I get? Or should I look at a completely different phone?