2,2,4 is universally better. First off 2,1,4 can be interrupted(offline anyway, good luck doing that shit online lol) 2,2 in general gives you so many options. For one you can hit confirm 2,2 and if it hits link in a freeze which sets up your BnB. If its blocked you can finish with 4,clone which throws up the clone as a shield. Once people are always expecting the 4 after 2,2 you can start doing things like 2,2 pause, 2,2,freeze. Or if they try to get off first after 2,2 pause you can finsh with 4,slide. If they block just make it 4,clone. Sometimes you can do 2,2, slight pause, ice clone and they will run right into it trying to punish you for 2,2 pause. Sometimes I do 2,2,slide because they usually wont fuzzy block until after the 4 so you can sneak it in there. Dont abuse it though. And they have to high block 2,2 because if you do 2,2,2 the last 2 hits overhead. But still if they guess right your a dead man which is why I say dont abuse it.Theres always good old trusty 2,2 and then throw when youve got them confused. After a knockdown if they try to jump 2,2 will take them out of the air plus you can link in a freeze and get B+1(whiff)2,2,1,2,slide.
Theres so much icy goodness with 2,2 lol