The biggest differences are Escape (was called Intimate when we did it) has a guest limit; there is not a "formal" reception; the minimum cost is a lot less with an Escape; you do not get to have a taste testing of your cake; if you want a cake that is not on the Escape list there may be an additional charge (we upgraded our cake and paid a lot for it); there is no official rehearsal (but you can do a mock rehearsal - we did). The reception at an Escape is not elaborate. You will have a violinist at your reception who will play your first dance, if you choose to dance, and he'll play throughout until you leave the reception area. You will have a formal cake cutting, a toast, champagne and/or sparkling cider or soda. You can do a bouquet/garter toss if you want to. You have 2 hours of photography after your ceremony (at least we did, that may have changed). You can have a DP with an Escape wedding. If you want you can book Cindy's Carriage for the WP. You still have a Wedding Planner holding your hand the whole way through. You get the same attention from floral and photo. You can book outside vendors for floral and photo. I don't think you can have in-park ceremony locations with an Escape. Also, our Wedding Planner did book all of our meals, maybe that's changed in the last 3 years, but we didn't have to book any of our after-wedding meals on our own as she did it for us.
Why we did an Escape - I only wanted my closest family at our wedding so the guest list was small; we wanted Sunrise Terrace at WL because it is so beautiful and it has a maximum guest count of 8; I wasn't into a big "look at me" reception with dancing, bouquet tossing, and such. We could have easily afforded a Wishes and briefly considered it but it wasn't worth it to us. Our wedding day was intimate and elegant. It was the perfect wedding for us, for others it would have been too small or they would have wanted a big reception. I think it comes down to what kind of wedding you want.