Sonic 3 & Knuckles (using Sonic) 9/10
First time beating it fully with Sonic and it was totally worth it, that final fight was unexpectedly awesome. I don't like the bonus stage as much in this as in Sonic 2, and some stage designs seem there just to piss people off but overall, probably the best of the MD titles when combined like this.
Spriggan Powered (SFC) 6.5/10
While the Risky Tech feature (gain bonus points for flying close to enemy bullets) is fun, this doesn't do anything new and the stages are mostly very simple as is the weapon system. Seems like it's more fun on Hard though so I'll try that some time.