Hey DarkkOne,
There is no reason to have both games as Ghostnet will only recognize one version. With the current system, you can not trade with yourself - you will need to trade with others.
This may change in the future, but there are only a small number of users who have both versions.
We just patched the game if you want to update: https://thestrangest.itch.io/shadow-gadget/devlog/441572/shadow-gadget-114b-ghos...
Thanks,