I currently have both FT and NGG.
NBAFB is not for me. Stern NBA is a fun game.
FT is short ball times. Can be punishing if you don't play it often. I'm on my third one. This one is staying. Perfect cab. Clear coated original playfield. Game is fantastic.
NGG is longer ball times. Not as difficult. But it's a blast. There are a couple up for sale priced really cheap.
Both are a lot of fun.