[Hybrid_11]

Honestly 2/4 full and 3/6 full games are substantially different. Ive been told, not sure if it can be vouged for but its one of the hardest transitions to make skill wise. I play 2/4 and 3/6 constantly and there really is a big difference between the two.
Since you admitted yourself that you caught a good run of cards in 2/4 might as well stick that out for awhile let your win rate even out and see how well your truly beating the game then take a couple cracks at 3/6.
By the way i never liked playing 6 max games but its clear that 6 max will be the way to go atleast with regards to online play so i would recommend trying to gain some experience with 6 max probably 1/2.