I recently went through an exercise on looking at the kits.
The 710-02 and 710-05 seem to be the same thing. The 710-08 is missing the Abrasive buffs (511E/512E) and a cut off wheel (540) and has some extra sanding disks. Its also got different shape grinding stones.
So very minor differences. I would see which is better price (looks to be the 08) and get that.
BTW you can see a comparison of the different size kits on [this](www.amazon.com/Dremel-709-02-110-Piece-All-Purpose-Accessory/dp/B00OAXKJO0) page. I found the 709-02 kit was less sanding focused and picked that (not interested in EZ-lock parts)