I don't know if there is a standard Warwick profile, they are "chunkier" front to back than say a Yamaha or pedulla. The Broardneck models whether Streamer, Thum or jazzman have a wider neck towards the bridge to give a standard 4 string spacing of 19mm. the nut widths are no wider than standard. without checking, i believe other standard 5 string models in the warwick range inc streamer II would be about 17-18mm at the bridge.
hope that helps. I found even though the neck is wide it was easier going from a 4 string to this than tripping over strings closer together than i was used to.