Great Expectations promo CD - radio edit?

I have just got hold of the only CD is was still missing from my collection (I hope), the Great Expectations promo.

Intriguingly, on the CD itself it says: "Great Expectations (Radio Edit)". Well, I can't hear a difference, and the track time appears to be the same. I even listened to the promo and album versions in parallel (as best as possible), one on the CD player, the other on the PC, and couldn't spot anything really obvious.