Both have the same aim behind them.....films actually of ISO 1000 but designed to give the best images when pushed to 3200 or thereabouts. I've a lot more experience with D3200, shooting in night clubs, gigs and parties at 3200-12800. On scenes with bright highlights, eg concerts or stage productions with bright lighting, it's great. It has the advantage that it comes in 120 flavour too which means reduced grain.
TMZ I've used less simply because it's more expensive. It's better than D3200 in daylight where I've used it to gain the ability to do fast shutter speeds for action, shooting at 1600 or 3200. In gigs and parties, TMZ doesn't do as good to my eyes as D3200.
Horses for courses. Both are capable of delivering great results in different circumstances but either could be used and the scans/prints made to bring out the features the photographer wants.