Forum:One article or two: Cimmerians and Solarians

I'm still embellishing the various Eighth Doctor Audio Adventures, and I have a conundrum...

BFA: Embrace the Darkness has two alien races: the Cimmerians and the Solarians. Trouble is... they're actually the same race, separated by a few (super-evolved) generations. Shoud I make one unified entry for them, or two separate ones?