Hi. Just bought a pair of orange splash V5 Viper as a backup pair from an online auction site. Being the same size, M, they are a bit different, one has a lighter, more vivid orange, has softer rubber, is a bit larger on the foot pocket (about one size larger) and is a tad lighter (680g vs 800g). Can they be from different batches? Maybe the seller lost one and replaced it at a latter time? Any experiences with this kind of differences on Vipers?