A brainbuster DDT is different from a regular brainbuster... With a brainbuster DDT, the attacker lifts the victim up like he's going to give him a vertical suplex, but instead of falling backwards, the attacker stops with the victim vertical and drops him on his head.
I think a "vertical drop" brainbuster is just a regular brainbuster... In fact, I think that might be what Kanemaru calls his finisher...
The fact is, brainbusters and lariats will never get tired in Japan. As long as there are guys who can do them right, they'll continue to be all over the place.
"I think the basic thing nobody asks is why do people takes drugs of any sort?... Why do we have to have these accessories to normal living to live? I mean, is there something wrong with society that's making us so pressurized, that we cannot live without guarding ourselves against it?" - John Lennon