Is Marriott harbour resort worth the extra money?

I’m going to FL for my 30th birthday with my husband and two toddlers (ages 3.5 and 1.5) in October.

My parents usually stay at the Ocean Sky and like it. It’s $980 a person on the dates we’re looking to go (kids are free). Please note this price includes flight. So $980 per person for the week with flight and hotel. Coming from Canada.

The Marriott harbour resort obviously looks nicer, but it’s $1750 a person (also includes flight).

Overall, Marriott works out to $1500 more than the ocean sky for a week.

Is it really worth the extra money or should we just save that?