I think it was RDR who did the caramel X lavender cross and confirmed that they aren't compatible. I've also heard that someone in Asia did the albino X lavender cross and also proved them not compatible. The one cross that I'm still waiting to hear about is albino X caramel. I certainly don’t expect them to be the same morph or either to be a combo of the other but I do wonder if they could be alleles (different mutations of the same gene). When someone eventually does this cross if they are alleles the babies might not be the normal looking double hets expected.