you will find that once you move in many basement surface owners will often be too lazy to use their space and they will end up robbing yours if on the surface anyway.
If its only a 100 e in the difference per year on fees then Id take it.
You surely would expect to pay more for a UG space also so to get it for same purchase price seems good to me.
Whats your car worth? also winter is harsh on cars, also if its a banger much more chance of not starting on a cold icy ,orning on surface.
Last advantage, no 10mins scraping ice from the basement on same mornings.