Eye 2+ refers to the type of grooves and the loft. And was a much higher production issue. The first were not legal at that time due to the groove issues. Eye 2 are a greater collectors item, I had a set of Eye 2 BeCp left handed with 3 digit serial number, that were stolen with my car. Breaks my heart they probably went into a dumpster cause they looked "rusty". But the Eye 2 is one of the most playable clubs still in my opion. Get a good price you will be happy with them.