I think pretty much all of the lithium jumpstarters are more similar than different in quality, seems like there is no such thing as a truly guaranteed "better" product but the cheap ones don't seem really that bad either.
I bought a cheap $100 one at Autozone two summers ago when my Ram wasn't starting, would have just bought a battery that day but Autozone didn't have an AGM in our size. I bought an AGM the next day somewhere else.
Anyway the Autozone unit has worked fine the three times I needed it on my truck (without recharging between, and still read something like 85%..) and it worked when I used it on my project car this year. So I guess it's been good, or at least good enough.
Regarding the OE battery it lasted just about four years, in Phoenix AZ . Never was fully drained in its life before that, I've owned the truck from new. Seems like wet batteries last around 4-5 years and AGM's last 5-10 years.