A couple of long ways which would definatley tell you, would be the size of the clutch (the 4EFTE one is bigger 212mm I think) and you could take the sump off and see the marking on the crank, I think the 4EFTE ones are marked as 4ET and the 4EFE ones as 4E. But failing that you could check each engine side by side and see the vacum lines and the differences. Or you could take the engine number off the block (I thinks it sticks out from the block above the distributor and then check with Toyota and see what they have it as (This would involve the least work and Toyota should know). Also have a search online and see if there are othe ways.