I don't think she's less like Ro than Paris, but I think that's a pretty good comparison. The way I see her as similar to Ro are what you described, plus she is a character that breaks the stereotype of her culture to the annoyance of most and amusement of some. Having faith in T'Ryssa is supposed to be rewarding as we see her develop, just as it seems the intent was with Laren.
Side note - did you create T'Ryssa, Chris?
Second side note - I have 2 of your books on my Kindle, and I enjoyed them both!