Dude, Hard Call.
Trilogy you get great advanced tricks, flourishes and utilities and misc stuff. It's like card magic candy.
With the Ninja Series, less tricks, no flourishes as far as I can remember. His presentation, teaching and editing style fit me better and I enjoy watching Brad's stuff "Dude, that rocks!" in a different way than Trilogy is more like, "What the F*%?$$!!"
Both choices have intermediate/advanced sleights. So either way, IF YOU COMMIT THE TIME TO PRACTICE, you'll get a lot out of either project. In my opinion, one isn't more advanced than the other.
Still, I feel I got SLIEGHTLY more bang out of my buck with Trilogy. I've had Ninja for over a year and still not confident enough with my pass to perform (tried it once and pulled it off... I still need to muster up a lot of courage to do any effect with a pass ... Hey if anyone can help...!). A lot more relative "baby steps" and slieghts and effects to choose from in Trilogy. Plus when I get tired working on a sleight, I can switch to a flourish. Been working on Tivo 2.0 since I got it (damn those buck twins! They are so smooth!), but have been able to work on and perform a couple others while still perfecting 2.0.
I still love ninja though.
Whenever I'm at an impasse as to what to get, I just ask myself, "Which looks more fun to me?" or "What effects will my friends and family enjoy?" It'll kill when I get Tivo 2.0 down, but it'll also kill when I get down my pass. I'm having a great time with Queens and Triumph though in the meantime.
If you plan on eventually getting both, fun factor should be your guiding light right now, either on the performing side, or the audience side.