Bahamut Beetles Breeding

Some Xylotrupes gideon sumatrensis adults have recently hatched from their pupae. I bought the larvae as Xylotrupes gideon sumatrensis, but they look somehow different, maybe X. g. siamensis?

Both males on the pictures are exactly 60 mm long, which is pretty medium for X. g. sumatrensis (going up to 85 mm), but they look quite major.