To all the Prestige lineage experts... I'm starting up a Head Prestige mid collection starting from the TXP. I just recently got a Prestige Pro, but as I understand it, there are three different versions of this--one USA, two Euro. http://www.80s-tennis.com/pages/head-prestige-3.html I have the one in the middle. It has a brown and red color scheme, except it doesn't have the "600" on it. It says Vibration-Control-System on one side. The other side has a Twaron description. Would this be a 2nd gen. Euro version? I take it that the left one is 1st gen. Euro and the right one is the USA version...? Thanks!