The Excalibur is more of a 'precision' machine. If you do highly detailed designs, I think you will have a better job with that. If you are cutting a large quantity of simpler designs (like simple ornaments, etc.) and are looking more for speed, the DeWalt would do fine. You can adjust the Excalibur to cut a little more aggressively (my partner Keith has an article on how to on our site) but you cannot reach the same level of precision on the DeWalt. That isn't saying that you can NOT cut precision on the DeWalt. I have done some very detailed stuff on mine. But it is far EASIER on the Excalibur to make the most intricate pieces. I have both saws and use the Ex for the detailed stuff and the DeWalt for the 'production' stuff.
Also - if it is a "Type 2" (newer) DeWalt, you may have issues. The newer saws are made much cheaper (they weigh about 14 lbs. less than those with the Type 1 motors). I have heard many stories of bad customer service on them, so unless you are a pretty much 'do it yourself' type of person, you may get stuck if something goes wrong. I hear from a LOT of people on saws and these are really the best assessments I can give along with my own experience. My DeWalt is a type 1 and it makes more noise than it used to, but it still cuts the huge amounts of simple ornaments that I sell for production without issue. However, I DO have to change to my Excalibur when I am doing any type of detail. I say to myself "I couldn't cut this on the DeWalt". That is my honest opinion.
I suppose it is up to what you would like to use it for. If you aren't sure - go with the Excalibur. You won't regret it.
Sheila