Having not purchased/used a Fleshlight, YET (eyeing the Lady Ice Crystal REAL closely), only thing I can offer is that the Flight, according to documentation, is smaller AND SHORTER. So, if you are interested in full insertion, like I am, stick with one of the 'full size' models. Between the two others above, I'd be interested in trying the Alien - while watching my favorite little "Na'vi" - Neytiri (played by Zoe Saldana), from "Avatar".
Never thought of myself as a geek before, but THAT little blue gal definitely does something to me, lol!