The machines are pretty much identical but IMO Precision Matthews has the best customer service of any company I've ever dealt with. The owner Matt will personally take care of you and walk you through any problems you have. I had a problem with the motor on my mill and two days later I had a brand new motor delivered. When I had a problem with my power feed he didn't even hesitate and sent me a new one.
With all things being equal I would go with the company that has a proven track record of customer service.