Boardwalk is bright, white and very fun décor. I think your mom would love it there!!! After a few stays at Boardwalk, I decided to book Wilderness Lodge the next time and WOW....so beautiful and fun there also!
I would think your mom will love either of them. Food choices IMO are better at Wilderness Lodge. I also love Magic Kingdom the best....... & the WL boat gets you there vey fast and it is a nice ride.
I would even try a split stay if you can, so you can see them both!
Good Luck no matter what your choice (s) will be!