3-4 DE's are 5 tech DT which are essentially under tackles in a Wade 3-4.
Traditional 2 gap 3-4 DE's are usually close to 300 lbs, this is not necessarily the case in Wade 3-4.
While traditional 2 gap NT are usually 320-350.
Wade has had 300 lbs NT like Jay Ratliff (sometimes played under 300 lbs) to monsters like Jamal Williams. It all depends on what kind of players he has to work with.
A traditional 3-4 also has monster ILB to shut down the run. Wade prefers fast ILB, like you would find in a 4-3.
Just like a 4-3, Wade will rush 4 guys primarily. Except in Wade's 3-4, opposing teams do not know who that 4th (or even 5th) rusher will be.
Please read articles below for more details.
https://www.milehighreport.com/2015/1/27/7922019/the-wade-phillips-3-4
https://www.espn.com/blog/nflnation...ees-more-flexibility-deception-in-3-4-defense