Neither of those will work because they have a Negative to Positive transaction. Positive can go to negative but not vice-versa. You can make diodes really easily with them too.
Currently they behave as programmed, but not as how they are in reality, ie105 seems to be working on this. For now, you can create certain gates using PTCT/NTCT, since they are temperature sensitive, you can use metal (which heats up when conducting) as a heater. this can be used to make AND and NOT gates.