Well, my opinion on Joe is that he's clearly ADHD. The first KS he did, the NES game, is now years late, because he got sidetracked into making a NES maker, then a prequel, then .... In other words, he should finish what he started before jumping into yet another distraction. He owes that to the original backers.
I won't be backing either project, since I can code for the systems. If folks want to try easy SNES stuff, remember that RPG maker started on SNES. Grab the ROM and the translation patch, and off you go to RPG making on the real console. I don't really see the appeal in a simple maker on a more complex console; most likely SNESmaker will be limited similarly to NESmaker, you just get nicer graphics and sound.