Generally, I don't go to shows to see actors, I go to shows to see stories.
And for Spelling Bee & Wedding Singer - it doesn't matter.
Just sayin'
To answer your question - Spelling Bee. It's smart and fun and great. However, Wedding Singer has a more fun score, in my opinion. Although it is fun and a great time, the book is horrible and the only thing enjoyable about the show are the featured actors (and the score).
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle