I currently don't have Dangerous, but Trilogy is most likely better and here is why.
1. Tricks. Dangerous will obviously features some hard hitting stuff, but most of Madison's stuff requires a gimmick and a bunch of pre work. The effects on Dangerous might be more fun, but Trilogy is almost all completely impromptu. No gimmicks required.
2. Everything Else is an amazing DVD. You will learn false cuts, new double lifts, some cool flourishes, a cool lepaul spread, snap change, and more. If you are new to flourishing there is the Flourishing 101 section. (I learned the Sybil cut from there.)
The Trilogy is only 25 bucks more if you get it from T11. Sure it is more expensive, but there is A LOT MORE information to be learned from the Trilogy. However, Dangerous I'm sure is amazing. Both are amazing. However, I would recommend owning the Trilogy first.
-Doug