having owned both at the same time I feel that the Littlebox stacks up quite well
the V3 is easier to set good levels on due to the metering... but that's nothing that can't be fixed in post
as far as the mics I ran thru them (460s/480s) I like the sound of both preamps
I decided that I wanted to go small with my rig, that's why I sold my V3 and all the batteries needed to run it