Bluetooth, mainly, and different design, but that's in the eye of the beholder. Don't know how sound differs.
Or pay 10% less than Richer Sounds and get it from argos ebay! :D
Would be interested to know the sound quality/tone of these. I have a Roberts Blutune 50 which is ridiculously bass-heavy, with no way of adjusting the tone. The controls on this one look better at least.
What advantages does that have?
Spend a little more if you can and go for the new model