The one I currently own is an '89, has the Scorpion driver, and is badged as
So it's a Solo, and it's a Bandit.
And it's a powerhouse. And I love it.
I do amp mods and repairs and played through scads of these back when they were (probably) the most common working mans' guitar amp in the US - so when I got this one, I dug around for historical info, schematics etc. on this family of amps and from what I've learned, there are only minor differences in circuitry and tone stack naming / arrangement - the overall chassis design can be considered as basically the same. There were a few seemingly scarce "transitional" models and (and I am by no means an expert in Peavey history) but in general, they are all great amps when understood and dialed in properly.
I'm sure others will chime in...these are still way popular amps