Sounds like Janome. The 6600 has the acufeed system which is like a built in walking foot that the 6500 doesn't have. The 6600 is a heavy machine that I was told would be suitable for quilting or if you were a seamstress. I had mine for a year and then traded it in for the 7700 when it came out. Still have the 7700. If you had a choice I'd go with the 7700, they should be pretty close in price now since they've come out with at least 2 other machines higher on the food chain than the 7700.