I'm in the market for a smaller cab and am looking at these two. They are pretty close to each other in $, size and weight but I'm wondering about the differences in sound. Anyone A/B'd these two? Which one would be more usable as a single cabinet for a small-medium sized gig? Is one much bigger sounding than the other? Seems like the 15 would sound bigger but the 12 has a deeper cab which might make up some of the difference. What do you think?