Cannondale definitely had variations in MTB frames back then, btw. I had a '94/'95 M800 and remember that it's 3.0 Series frame was easily distinguished by the canti'ed dropouts, which the lower lne 3.8 Series didn't have.

you can find the '94 catalog here: http://66.147.244.179/~vintagm8/year/1994/1994.pdf.