Should I buy a laptop with a i7 8650U or a laptop with a i7 10510U?

I plan to use the system for school, web browsing, and maybe super light gaming. I am fine with taking the risk of the system just stop working after an update because all progress and saves for work would be directly saved to google drive. The laptop I'm looking to planning to get is the HP EliteBook 850 G5. It has a i7-8650U with 16gbs of ram with a 1080p ips display. I am trying to get 4 years out of the laptop and it comes at the price of 175. If I bought it realistically, how long until mac os gets slow to the point where random lags and playing videos on youtube at 1080p gets too hard for the CPU? I am also looking at another laptop for the price of maybe 300-350 and the laptop is the xps 13 7390. It has a i7-10510U with 8gbs of ram. Would the newer model be a smarter buy and make up the difference in the price? Which laptop should I get