Don't have anything to say about your comparison, seems fair to me. One thing I personally add to it, though, is the price difference for the replacement keyboa

Don't have anything to say about your comparison, seems fair to me. One thing I personally add to it, though, is the price difference for the replacement keyboard and the difficulty of replacement procedure. Any keyboard may fail due to user spilling stuff on it, and in case of XPS, you could fairly easily splice in another one.