ya forgot about that extra warranty!!! Dont forget it!!! Then it is a no brainer like GATORDONE said. Its got more power, comparable towing and capacities, better looks (my opinion), faster top speed..... did I mention it will haul a**. lol yes I test drove one and that would be my choice. Big difference in the 825i and our 620i. No comparision at all. But not again without that extra warranty!!!!