Builders 1 came out in March, and it did 28k FW, 67k LTD according to Famitsu. Considering that LTD number, the short period of time between the two releases, and the fierce competition on NSW (the game is competing with Super Mario Party, Pokémon, Smash, and of course Minecraft), I think 90k would already be a very nice FW result. It should also be considered that the Dragon Quest audience has been more established on PS4, thanks to the multiple spin-offs through the years and the release of DQXI. Meanwhile, the NSW only got late ports until now. The holiday competition on PS4 is much weaker as well: most big games (Call of Duty, God Eater, Judge Eyes) aim for different types of players.