I have a BSR6EG fretless and it is absolutly amazing.
You want a neck and bridge pickup.
You can get so many different tones out of the smith fretless and you can use only the bridge pick up if you want.
If this will help you, I did this little vid showing the different sounds with the electronics on different settings....
The single pick up design imho limits the sounds you can get from the instrument. But some of those also have a piezo pickup.
http://www.youtube.com/watch?v=uzWDl-mB030