Having owned a Thumb4 and gigged extensively on a Thumb 5, I would not describe the Thumb as inherently having "booty". IME, the Thumb is designed to have pronounced low-mids and a very cutting tone, but there isn't much there in what I think of as the "booty" lows. The Warwick circuit will dial in a large boost at 80 Hz, but it still isn't the same as my Corvettes were or Streamer, Spector, and G&L are.
That said, they're phenomenal basses for what they do if that's your sound. Only reason I sold my NT5 was because my Streamer Stage II effortlessly nails the exact sound I want.