I have both the Polar and the Snow so I can compare
With Polar there are dedicated knobs so for realtime tweaking, Polar is better. With Snow, you first select which function you'll modify and then you use the 3 soft knobs to make the editing.
I also recommend you to make a custom template for your MPK49 to get more knobs for editing. This is by far your best bet and you won't have any dependency from the Virus Control:
Virus TI ReMOTE Templates v0.7 - Now with sysex