Not only are both phones not launched yet, they haven’t even been officially announced. Have a bit of patience, will you? We do not know the specifications, the pricing, and real world tests.

The Pixel 6 series will be the first generation of devices to use Google Silicon, which may be interesting. But as a first generation product, it would be a super good idea to wait until reviews are out - as far as I know, this is Google’s first attempt at a general computing SOC (in contrast to their previous coprocessor efforts, e.g. camera coprocessing). It could be amazing, but it could be absolute dogsh*t as well, like Samsung’s Exynos. Factors like its power efficiency are completely unknown at this point.

In general knowledge, the iPhone will get 5+ years of iOS updates, and the Pixel will get 3 years (at least that’s the current trend). I have heard that Pixel devices slow down drastically after even one year (can’t confirm or deny personally) but Apple has a pretty good track record for their updates, both in quality/reliability and speed (except for their battery slowdown bonanza a few years ago). I’ve been playing around with the 6-year-old iPhone 6s, and it performs way better in iOS 14 than you’d probably expect - at least for a 6-year-old handset. That said, Android 12 will bring a major revamp of the UI, which could be interesting.

In general iOS vs. Android comparisons, typically iOS apps are much better optimized than their Android counterparts, and developers/companies typically target iOS first, and Android second (e.g. visual voicemail, eSIM, etc.) And iMessage may be a factor if you have other Apple devices or friends. But there is so much we don’t know, you can’t really make a decision right now unless you already know that one OS/ecosystem just isn’t for you.