Chiming in late here.
I have a 16GB/1TB 14" M1Pro MBP (for work) and a 8GB/256GB M2 Air (casual use).
The two machines perform identically for 99% of general computing tasks. I am sure that benchmarks and torture tests can show differences. I am also sure that if I open Activity Monitor, I could show difference in swap, memory pressure etc. However, without activity monitor it's hard to tell them apart until I start opening silly amounts of windows and apps.
A lot of YouTubers (MaxTech, I love you, but you're intentionally trolling about this for hits/views) talk about differences in RAM. Many of those YouTubers are creatives and work extensively with 4K video, large photos, coding etc. Sure they will see the difference, but if you're doing office stuff, lots of Chrome tabs, some casual photoshop, then 8GB is plenty fast with Apple silicon.
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Ultimately it comes down to whether or not $200 will make a difference to you. If it helps you sleep at night, get the 16GB. Just know that most of the time, it's not going to make a difference to your perception of how the machine performs or lasts.