I'm not saying the person who provided that comparison was malicious, or incompetent-- Simply that they did not know how to get the best out of the scanner. A very reputable scanner website reviewed the Epson flatbeds, and concluded that they were, at best, capable of 2200 to 2600 DPI (depending on model and software). The problem is, all of their 1951 USAF Target scans were out of focus. You can't make a reasonable determination of scanner quality if you start with bad data-- garbage in, garbage out, as the saying goes.
The V7xx/V8xx scanners are kind of odd-- they have two imaging elements, one of which is focused at the top of the scanner bed glass. That's a "low" resolution element, and I believe it's 4800 DPI. It covers the majority of the scanner bed.
The second element is adjusted by the factory to be +3mm from the glass bed, is 6400 DPI, and only covers the middle 3/5ths of the scanner bed (roughly). There is no way to adjust that focus height without dismantling the scanner. Instead, the V700 trays have multiple two-position "feet" for each tray, and you take the foot off, turn it around, and replace it to change the scan height. The V800 holders have multiple 5 position sliders, and you need to determine the actual focus height your scanner is working at, and adjust the trays accordingly. But you have to make sure they're in the right position every time, because they're easily dislodged.
My scanner, having never been moved more than 1/2 an inch in any direction without the transport locks engaged, appears to be correctly calibrated for +3mm. So in that position (default) on my trays, with the film down, emulsion side towards the scanner, I get the best possible result.
In addition, I use Silverfast-- but I disable nearly all of it's tools except for Negafix, histogram, and sometimes, iSRD (infrared scratch + dust removal) or multi-exposure if I think the range of the negative is a bit much for the scanner. All other editing is done afterwards, and usually includes a small amount of sharpening, because there is some softness added during the scan-- but nowhere near the level most people claim.