You are forgetting 90% of the people who have TE449 or 511s uncork them naturally, which does not I'm theory, make them 50 state legal. So in that regard, you can compare to dirt only models. Granted, since almost every shop doesn't care that you uncork a "factory" 50 state legal. I know when you do all the almost necessary mods to TE models, they are no longer 50 state legal under rigorous inspections. But like I said, no shop really cares as long as the "from factory" setup is 50 state legal they are generally fine passing inspection and registering for street. Funny how easy to forget how tame all the TE models are from factory which is what make them 50 state legal, but no one actually rides them that way.. Well most.
And I never said DRZ are faster then TE, from what I remember.. But for most TRAIL riders, not racers, reliability is a big factor. Two different animals.
I modded my WR450 to be street legal, I'm mechanically declined and it was quite easy. $500 total cost, and I didn't have to drive 3 hours to shop to reflash or try to diagnose stuff they weren't familiar with!
Does not matter that you modified them unless someone is going to do a close inspection which almost never happens. What does matter is that it came from the factory as a plated bike so you get a plate and keep a plate. Many people were pissed here in the NW when they got a nasty letter saying there plated KTM was not palatable and was removed. So now everyone buys a plated bike and strips it and powers it up to varying degrees. In most cases is is much EZer to power them up than try to make a non street legal model street legal and some states flat don't allow that at all. As for DRZ -v- 449/511 IMHO the 449/511 is hands down far superior to the DRZ in most everything performance wise. As for reliability the DRZ probably wins that game but most are finding the 449/511 quite reliable as well. Maybe not 40K reliable but very reliable all the same. All good bike just chose what works for you and enjoy.