The Veiled Chameleon species, contains two known subspecies.
-Chamaeleo calyptratus calyptratus
-Chamaeleo calyptratus calcarifer
is not readily found. It's distinguished by a shorter casque in males. It's possible that in the region where this subspecies lives, that there is less demand for water intake.
The "Sunburst" label is a designer name to make the chameleons sell better. The names will distinguish certain more prominent colours. (includes- Sunburst, Turquoise, European Blues, etc and any name that someone wants to use to market of their "Unique" veileds). In my opinion, breeding them is of no importance, but rather- a stunning veiled chameleon paired with a second stunning veiled will result in stunning babies.
, The panther chameleon, has no subspecies. The colour groups are indicative of geographical localities of where they come from in the wild. The colour groupings are usually separated by, mountain ranges, rivers, plateaus, where over long periods of time, it have focused in the amount of individuals and bloodlines, to make more differentiated morphs.
Cross breeding locales is generally frowned upon, as females do not carry the colours the males do- regardless of their native origin- thus making it nearly impossible for breeders wanting to keep their bloodlines pure (as pure as possible...) to the natural evolution. There have been interesting findings that cross locale offspring are not as hardy, or can be infertile- this would be because the evolution has gone far enough to make the DNA less compatible. Yes- meaning that if they were left along another million years, that they could possibly split into different species.
The only source of information regarding this is:
The Panther Chameleon: Color Variation, Natural History, Conservation, and Captive Management
By: Gary W. Ferguson, James B. Murphy, Jean-Baptiste Ramanamanjato, Achille P. Raselimanana