We have done both and would do both again, depending on what was in the budget.
We really like WCT, although the service is slow consistently. There is a small indoor area and if we get seated in there, it's just not good. Really loud, kind of crowded, just not enjoyable. Outside is much better. This is usually our "pasta party" on half-marathon weekends when they did them since the actual pasta party was ridiculously priced.
The dessert party we've done once and we really liked it. The waiter was great, very attentive. We are only a party of two so we had to share a table with another group who did not wish to speak to us at all, so that was a little awkward, but not that big of a deal. We had a fine time just the two of us. The dessert plate is way too much to eat, we ended up taking about half with us to our hotel.