Aside from the other 'upgrades' on the car, the Sports Package on the E53 made the ride much firmer. Some find it too harsh. I personally love it. I assume there is a difference in the E70 as well. You are always better driving before you buy, unless you will be ok with a firmer ride, in which case, get it!

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-'13 E93 M3 Cab, Interlagos Blue, Carbon Black leather, DCT, all options, and fun, endless fun!
-'13 X5 35i M-Sport, Carbon Black & Cinnamon, Dinan Stage 2!
-'15 Toyota Sienna Limited Premium AWD, Silver & Grey, Nav & BluRay, and less lame than the 2011 it replaced
-'07 Mini Cab S, Laser Blue, 6sp, endless fun that ended (sold)
-'04 X5 4.4i, loaded, loved, modded and sold