I've been playing East Ladder RoC for probably 5 years off and on. Decided I should give TFT ladder a shot, currently 22-3 (i think) from this ladder and last. I still don't understand the counters of tft but being a RoC ladder player I know essential skills such as micro, macro, etc.. It really is a different game though with new heroes, items, units. Quite interesting and fun to start out as a noob essentially. If anyone wants to game and is pretty decent (not noob) message me on nOoBaBuSe (usually a bot, rank 1 2s on RoC) or DooM.GuaRd.
RoC = Non Expansion
TFT = Expansion
for those who dont know