I like both and have found my family and I play both without either being a favorite.
The descriptions of Wii Party above are all pretty accurate with the pacing and variety of game types being the greatest strength.
I think, given the situation, you may eb better off with Mario Party 8 for the sheer fact you know it is something your mother and you will enjoy together rather than taking the risk that either you, her or both may not like Wii Party. Perhaps rent Wii Party later on.
The rEVOLution is not being televised







