Here's today's silly question of the day...

What is the difference between a spindle gouge and a bowl gouge? I have been trying to improve my sharpening skills recently, with only moderate success, I might add. Was doing some reding about sharpening, etc. and what I read says the geometry of the sharpening is different. What, if anything, other than the sharpening geometry is different between these two gaouges? Thanks.