Just my opinion, but I really like the 5.5 mm feed-dog more than the 9mm. I can't remember which the 630 has, but if embroidery is important to you I think it has the same embroidery unit. When I decided to sell my 730e my husband was very, very upset with me. He told me the he was the most upset he had been since he could remember, we have been married 32 years. So I had him sit down and use both machines, afterward he came to the same conclusion that the Bernina 230PE was better for piecing. I also had him play with the BSR, I had thought I would quilt with it but decided I would never get the hang of it, he didn't like the BSR either. Not wanting to offend anyone, just my opinion.