That's certainly a way to look at it. More accurately, the contender is more like a SB2 and the Encore is like a SB2MAG.
The contender also in its earliest model, (that if not converted) should only be used with lower pressure chamberings, like the SB1. The current offerings will fire almost everything the SB2 can AND has a dual firing pin that can switch between rimfire and centerfire. The Encore is a centerfire/black powder only.
CW