I think EVERYONE on this site either uses the Chin Spins or the Flying Saucer. I have the flying saucer, and it took my chin about 4 months to finally start using it. Im guessing the grape escape is some little 12 inch plastic wheel, which are no good for chinchillas at all, as they need at LEAST a 14-15 inch diameter wheel..which is what the medium FS is. Id go with those, im sure a simple google search could find a website for you
OH I knew there was one more brand, I thought that was the silver surfer or something...or maybe the grape escape is the purple silver surfer? lol..confused.