ThinkPad P16v G1 AMD vs P16v G2 Intel - which and why?

Hi everyone!

Another day, another question in my quest for the ultimate ThinkPad for my needs on a tight budget.

I was on the verge of buying a p16v Gen 2 Intel, but what worries me is that I can't find any solid review of it, and among other things I couldn't find info about the expected battery life. So I searched a bit and I found reviews for the p16v Gen 1, mostly the AMD versions. Which is actually pretty cheap and has positive reviews, both in terms of performance and battery life.

So now I wonder. Should I get a p16v G1 AMD or a P16V G2 Intel? Which is more powerful? Which offers the best battery life? (and is heat an issue with any?)

Another thing that irks me is that the G1 AMD doesn't have a 400nits display option. So it's either the 300nits or the WQUXGA 800nits. Pricey but within my budget still. But won't it kill the battery life even at the same brightness due to the extra resolution?

Also, my T570 handled 4K terribly (ran atrociously slow), forcing me to actually run the machine in blurry 1080p mode. Is that still an issue with today's machines?

So yeah, overall, which one would you chose and why?

One final question: let's say hypothetically my 170W charger died on me. Could I, as a temporary emergency solution, at least slowly charge it using my old T570 65W charger while the p16v is turned off or in sleep mode?

I know I've posted a lot of questions on this sub already, sorry about that, but I'm trying to be money-savvy and buy a machine that won't disappoint me for the next 5-10 years.

Thanks in advance!