Yes, it pretty much comes down to latency performance and as you compared your UR44, my old FW-1082 ran along side of this USB 2 performance.
It had 8 channels but was firewire connectivity. With that said, all mentioned can get down to 1.7ms latency which is very acceptable.
This Clarrett was scheduled for an April release so I opted for the Roland Studio Capture instead which has 16 channels, 12 Pre’s, DSP, ‘separate channel phantom pwr, phase, locut and auto-sensitivity’ for the same price. Good sound and a lot of useful bells and whistles.