I use my 15-91 for FMQing because:
1. The feed dogs drop
2. It has the largest harp of any machine I own
3. Very good visibility
4. It has a verticle bobbin which means it has one less twist that the bobbin thread has to go through. Also makes it easier to change the bobbin in the middle of a quilt.
5. It is the only machine I have that is so forgiving that it will sew in any direction without thread breaks, bird's nests or eyelashes on the back of the quilt.
6. It is easy to clean and maintain.
7. It's pretty.
8. I feel connected to the past when I use it!
i love my 15-91, but don't give up on your clone. It quite possible will do a great job with FMQing. The only way to know is to try it! Let us know what you discover about your clone!