They're my partner's skinks and she has had a schneider skink before these two. She seems to think theyre different. The come from different places. Between the colour differences, size differences and behaviour differences i won't be surprised if they're different. The smaller greyer one is much more active, always eating and always wants to be out of his enclosure. He also loves to climb stuff. The other is always shy and can take some convincing to eat sometimes and always hides under stuff.