Graphical discussions aside, it's pretty difficult to pick least for me. DOA has quite a few where it has a certain cool vibe attached+animez, though Tekken seems to be in that same category of over the notch anime. Eh, can't really pick.
I like DOA’s tag throws more because they seem more fluent to me. Like Hayabusa and Momiji’s And Kasumi And Hayate’s tag throws. Those were to me the best tag throws in the game.
DOA’s are creative and more fast-paced. Watch the TTT2 video and then immediately watch the DOA4 one, it’s like night and day, plus that electric floor danger zone adds to the action. I will admit, some of the Tekken ones are great like the Asuka/Jun and Drag/Bryan ones tho.