I have the Brother because I found it used for a great price. Almost brand new. I tried the Juki at the store just before I found the Brother but didn't try the foot operated cutter. I don't know how much better that would be than the button I press. My hand is very close to it and so it's no problem to reach up and press it. At $350.00, I'd grab it quickly.
The Brother is an almost exact clone of the Juki (2000? I believe), they are a basically the same machine.