CoH2 took some lessons from Coh
nline and incorporated them into an advanced version of vCoH. You will see better visuals and maps with far more little objects. Everything just looks and feels better than in vCoH.
You have multiple Commanders, which can change a lot about how a faction plays and make for much more strategic diversity than we had in vCoH. We have 5 factions with all their strengths and weaknesses. You can now vault over fences and such, which opens up the map do much more possibilities. And if you are a geek, you can even chose different camo skins for your vehicles.
There are some downsides ofc but the advantages outweigh them. Aside from the ever changing balance, I can't seem to find anything worse than it was in vCoH. Well, optimization sucks, so make sure your rig is good.