Yeah, 35mm is 24x36, so 864mm^2 image area. 6x6 is 56mmx56mm image area, so 3136mm^2, 3.6x the area. If a good 35mm lens delivers 80lp/mm, a folder needs to deliver 22 lp/mm to match it. The 6x6 negative will be easier to actually get the detail off of (drum scans = $$$) and there will be less grain. Of course, there's less depth of field, unless it's a Zeiss film flatness and standard rigidity will be an issue, and guess focusing adds another way to lose a shot.