no experience with the Shop Fox.  Might be okay but for $150 more ?
I have a Ridgid.  Dust collection is fair.  Not too fond of the belt sanding on this machine. I would rather use a disc type. Oscillating spindle is handy for sure.  
I see Wen has a hand held oscillating spindle sander.  Wished I would have known about it before I bought the Ridgid model.  I would have given it a try.  Lot less $
One thing on the Ridgid that I was less than impressed with is the drum storage on the front.  I quickly took all that stuff out of those spaces and put them in a box.  My sander is mounted on a flip cart and all that stuff would fall out when I rolled the flip top over.  I see the new Ridgid has a little better design for the drum and washer storage but would be the same if used on a flip cart.
Older Ridgid like mine is 5 amp I believe.  Plenty power.

Drop out of warp and prepare to be boarded. Mike southwest CO