Are Gen 2 glocks as good as the other generation glocks?
No.
They're notably
better.
I bought two gen two G19s at the same time, NIB, back in 1989.
Since then, I've shot tens of thousands of factory 9mm rounds through both of them, mostly FMJ but lots of premium JHP too, with never a bobble.
I still have them both, and eventually had the slides hard-chromed since the original black phosphate finish wore off. I've put plain black Heinie sights on them, and replaced the magazines with more modern metal-lined ones (still have the original all-polymer ones, though, and they still work fine), and occasionally updated the recoil springs, but nothing has broken, ever, and both guns retain good precision, about 4" at 25 yards.
I've acquired eight other Glocks since, all of them gen threes, in 9mm, .40S&W and .45ACP.
I got rid of the .40s, since I found no use for the caliber that I didn't get with 9mm or .45ACP, but I have all the others, and I like the gen two G19s grip frames better than ANY of the finger-groove gen three guns.
So now you have my opinion.