The EMP6 is essentially the same as a Brother PR600, just different fonts built in. It's a 12+ year old machine but they are pretty bulletproof, all depends on price and stitch count. They are very easy to learn and if you only use the hoops that come originally with the machine, you pretty much can't get into trouble with them. I had 2 PR600's, one had 65 million stitches on it, the other had 50K+ and they ran perfectly. We upgraded to the newer 10 needle machines otherwise I would still be running them today.
Not familiar with the others.
Not familiar with the others.