Here's the accompanying blog post for the comparison between the Epson V850 and Plustek 8200i. I'll put a breakdown of the settings I used and post uncompressed comparison images for the pixel peepers out there.
The Plustek file was scanned at 7200ppi and downsampled to 4500 pixels along the long side. The Epson file was scanned at 4800ppi and downsampled to 4500 pixels along the long side.
Both files had a degree of unsharp masking.
The epson file was adjusted for Curves (including RGB) and saturation.