I found that TF2 gog version supports cloud saves. I'm stuck between steam and gog. Is gog cloud save system of TF2 better than steam's?

Late answer, but hopefully you or someone else will still find this useful. GOG has a very tight limit for cloud saving and this game saves a lot. So there is a chance you will reach the limit pretty quick. I definitely did and it was annoying to get an error every time I quit the game. So, eventually, I jad to turn cloud saving off for TF2. I don't have TF2 on Steam, but I have TF1 and never had this issue there for that game. So, if cloud gaming is important for you, I'd suggest going with Steam instead of GOG.