They should work fine, though I make no guarantees.
I think in 1.3.3 the sheets.vol might have been slightly changed (something with tubes / trade center or something). These would only affect multiplayer, so they *should* work fine.
If you want to be absolutely certain that they will work, in case they don't work with 1.3.4, hang onto an old copy of 1.3.3 for playing single player. But again, I don't think there should be any problems.