The scanning depends on a lot of things, like your receiver's innards and its firmware, how many transponders are on a satellite, with how many channels, etc. I've used a sampling of several makes/models of blind-scanning receivers and gotten a wide range of results. Slower scans sometimes mean more accurate, but not always. I scan so much during the basketball and hockey seasons I wanted a fast, accurate box, and finally settled on the Icon.. there may still be some dealers with unsold stock. The Satopia is the same internally, I think they are identical except for case color. With the Icon I can get through the average ku band or c-band satellite scanning in 3-4 minutes and it doesn't miss much. There's lots of opinions here on which receiver scans best, or which is fastest. It's like car choices, mostly, its what fits YOU.
The newer receivers that are HD and also some scan for the DVB-S2 signals, I can't tell you about. Read the review section for some of those, like the Azbox, Sathawk, Pansat9200, etc.