They are probably the same price since they are 20" X5 wheels. Check getbmwparts.com for the real price so you are informed when the dealer gives you his numbers.

**Edit**

214s are the only things listed.

Description Year MSRP Price Core Price Your Price Style 214 (10x20)
07-11 $637.72 $510.18
Style 214 (11x20)
07-11 $711.26 $569.01

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PCD 12/3/10: 2011 X5 50i/Alpine White/Cinnamon/Bamboo: M Sport, Tech 20" 333, Cold Weather, Premium, Prem Sound, Rear Climate, rear heated seats, HUD, CA,
Wifey's ride: 2011 X5 35i SA Vermillion Red/Tobacco/Walnut Tech 20" 214, Cold, Prem Sound, rear climate, CA