I think one of the DLC enables more depth with the Pralor and cravik robot race.

Yeah, generally the team will add DLC features to appropriate races, so the Pralor and Cravic would be obvious choices, and possibly the Borg, too perhaps...

If you jump on Google, do a search for the STNH Wiki, I'm pretty sure there's information on what specific features are included for each faction by each DLC (or there used to be, if it's no longer being updated)...

There isnt, only place that exists is in the post about it on this mod page discussions although its out of date