Hey Gameguy and PutUrQuarterUp, I can provide some clarification on those Sonic comics you have.
This is the first issue of the ongoing Sonic comic series that's still published to this day!
This is the first 48 page special issue Archie put out. There were quite a few more over the years, but they discontinued making them because they weren't selling so well. (I think.)
PutUrQuarterUp, I never got a S&K poster with my copy of this issue because it was a reprint. Could you put up a pic of the poster for me? I'm curious to see what it looks like!
Also, if either of you are interested in reading more of the series, I suggest picking up the Sonic Archives series. They are reprints of classic Sonic comics compiled into several volumes. There's 12 volumes out so far. It's a cheap way to collect the series without having to pay insane prices for the individual issues.