Rose, I had two Siamese brothers Ying and Yang(Ying is now in heaven and boy did Yang grieve for him). They were Siamese twins through and through, always together sleeping etc they even both became diabetic at the same time and at first their blood glucose readings would be nearly the same but even though they were so much alike they were also different. Yang was more the territorial/ assertive one and Ying the shyer one who was the follower. Ying was the one always one my lap needing my attention all the time where Yang wanted attention to but wasn't so needy. I don't really know what my point was except I would not separate them. they might need each other more than you realize and they might jsut move at different paces.
Melissa