to my knowledge the only notable difference between shine bugs is their colour, brightness, and deco. it got me thinking that the variants could have different light and radiation related properties.

Shine bugs are unchanged.

Sun bugs get the "UVC" (sunburn) light and can kill germs from their light (like germicidal UV lamps mod) as well as radiation. comfort range changed to between 30 and 60

Coral Bugs become aquatic (can't fly. must swim. but won't die on land. can not drown)

Royals emit lower light and no radiation.

Azures have a lower comfort range of around -20 to 15

Abyssal absorb radiation (negative radiation value if it works, else just emit no rads) and kill off radioactive contaminants near by.

radiant emits less radiation and lights a wider area as well as being brighter.