For me, it would depend A) on will you travel a lot with it vs desktop mainly, and B) Usage (area/desktop space/workflow type)…both can be configured to the same specs with the right amount of money…but do you have a workspace or desk big enough to park a 16” machine? If you use a monitor and dock, then maybe screen size won’t matter anyways. Bigger size means 25% more battery capacity and I also saw that the M1 Max chip on the 14” gets a higher wattage charger than the M1Pro chipped - but still less wattage than a 16” charger. The 16” weighs 1.2 lbs more than the 14” - so if you travel or carry it for long periods, will that weight bother you? Again in my situation, lots of MS Excel and video timeline editing, so bigger screen is better for me. They have the same amount of ports, where in the past, you had to go bigger to get more ports.
I started w/ 15” Power books, then down to 13” MBPs and now on a 16” Intel MBP and that screen is awesome. But when I had 13” ones, I was deployed on ships or flying and a 13” was way easier to travel with and work on while traveling.
Tough choices for sure.