Hey guys!
Is there any chance to play vs on the same GOG account? Im sharing account with my husband and we'd like to play one against another but not on the divided screen :D
If it's not possible... well got no choice then.

Have a nice day!

Yes.
According to the store page, the game features local multiplayer.

By this, it means exclusively hot seat multiplayer, i.e. taking turns on the same computer. LAN is not possible.

I don't own the game and I simply reported what it is said in the store page: thanks for clarifying.
Anyway hotseat is a local multiplayer mode, such as the split screen mode, and let players compete against each others on the same PC, just like OP wants to.

LAN is a complete different mode: it requires multiple PCs and it legally requires multiple copies of the game. This is not what the OP asked about.

It actually is ---> "we'd like to play one against another but not on the divided screen :D "

You may not believe me, but I missed the word "not".