IMO, the yellow is a very nice board for progessing with. There is a phenomenon that Ed Sullivan has described and points to in this thread. As you get better with your skill set, you can step down in board size. I believe the yellow has a max recommended weight of 200 pounds and Ed exceeds this. My speculation is that at the start of his riding he would have had difficulty on the yellow, but at this point rides it fairly easily.
Inland does a fairly conservative job with their weight ratings, and the yellow, again IMO, can be ridden by folks beyond that 200 pound limit. I think the 220 pound range is suitable, especially if the rider has some experience.
The red is inland's beginner and big guy board. It's exceptionally stable down the line and if need be swapping the 3.25 SB's out to 3.5's or 4.0's will make it track as straight as a train on rails. It can be a bit overpowering for smaller riders (petite women and kids) simply due to it's width and thickness. If the group of newbies you have on your boat are smaller than your 220 pounds, the blue is probably a better option. If however, you are called 'skinny'
by your crew, the red is the better bet.
I think both the red and blue can perform well in just about any wake from small on up, although big guys on small boards in small wakes isn't the optimum combination.
I think the pictures don't do the woody models justice, in person the grain shows thru much better.
Don't hesitate to call Jeff Page or Mark Sher of Inland, both of those guys are straight shooters. They will guide you to the correct product selection based upon the criteria you present. They're good people.