so which amp would suit alt rock/pop punk, nu-metal better?
and also anyone have any other suggestions on similar priced amps
The 333xl is the better of the 2 amps generally speaking, but it's also a bit more expensive, If you have the cash go for the 333, it will do everything the 6262 can do and more.

I have a bugera 1990, had it for a year and no problems, great sound too, i love it.

The best thing you can do is try to go to a store where you can try one out.
My youtube channel

Epiphone Korina explorer, Fender MIM Strat, Ibanez GSA60, Ibanez AEG25
The amp: Bugera 1990
Pedals: Ibanez Tubescreamer,wylde od, wylde wah, Tc electronic g major,