Which of the two games is more active?

I’ve already played both of them on the PS3, so now that I got the collection I’d like to focus on the most active one.
I loved both of them so I have no bias.
What do you guys suggest?

Borderlands 2 has always been more popular, mostly due the the vastly larger amount of content, so i’d say that is more popular now than TPS. I can’t speak specifically for the playstation community but it’s that way on PC and Xbox platforms, so i’d assume it’s the same.