i think ag. siam aurora is the easiest to distinguish WHEN it's grown in good light - the leaves can turn almost totally blinding red-pink. where as crete/cherry retain a lot of green and red is in veining/edges.
but crete/blk cherry ? i won't be able to tell the difference. it would be interesting to get all three from the same reliable-label source and compare under same growing conditions. or at least take pics in the nursery of all three .
i did just find a ref to ag. 'creta' on a whole-salers nursery site - perhaps it is a correct name?
here's a great pic link - not in english, but on the right side there is a list of hybrids: indonesian and thai. click on names to see pics . that's the most exhaustive list i found so far. however, 'siam aurora' is the only one in that list. it makes me think that perhaps crete/cherry are US trade-names? or perhaps it's an english translation of the name - at least for black cherry?
http://aglaonema.co.nr/
