Hi Bass Boy J 
Back in the days
active basses were noisy (sound engineers hated them for recording)
passive was the way to go in studioland.
Back in the days
active basses were a lot louder than (most) passive basses
active was the way to push live gigs.
Today?
Take the lightweight for running and headbanging on stage (maybe the passive is lighter?)
Take whatever feels (plays) more comfortable for recording!
(you don't want to fight your neck and do more takes than needed)
No matter what you do, always bring both (a backup never hurts!)
greetings
Wise(b)ass
I'm in a thrash metal band, and I already have a passive bass, and I'm most likely going to get an active bass soon. In a studio and live setting with this genre, when should you use these different basses?
Back in the days
passive was the way to go in studioland.
Back in the days
active was the way to push live gigs.
Today?
Take the lightweight for running and headbanging on stage (maybe the passive is lighter?)
Take whatever feels (plays) more comfortable for recording!
(you don't want to fight your neck and do more takes than needed)
No matter what you do, always bring both (a backup never hurts!)
greetings
Wise(b)ass