OK, what's the difference between a Porter Cable Random Orbital Polisher and their Random Orbital Sander, like model 7336???

like here:

http://www.northwestpowertools.com/s...arrel/7336.htm


Looks like the same thing to me and the "sander" goes for about $110, whereas I see the "polishers" for about $199.

I'm thinking we just need the bonnets for the polishers.

Who has the best prices on these things?

TIA!