My previous proxes looked identical on either side so they could be flipped. My new Nankang SP-5's are also identical on both sidewalls. I did see a set of Diamaris and also noticed that the inside sidewall of the tire looks almost like it is unfinished. You would think you have paid them enough for two finished sidewalls. Haven't had/seen any others.

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2010 Lexus RX350 still new
2003 BMW X5 3.0i w/sport package w/68K miles. (gone Thank God!)
2002 Dodge Ram 2500 4X4 cummins diesel w/198K miles, custom repo truck
2009 Scion tC w/46K miles
2007 Suzuki SV650 custom streetfighter
2000 Lexus GS400 w/165K miles