I'd guess that there's considerable difference in the geometry of a Dutchie and that Jamis. Looks like you have to lean forward a bit on the Jamis. On proper Dutch bikes your assbone, back, neck, and head are aligned, your hands rest on the handlebars but not really weight bearing, and when you pedal you don't feel any backwards force (a common problem on many comfort & leisure bikes). I've not found a comfort, leisure, beach, bikeshare, or hybrid that is very comfortable for very long. I've ridden Dutch bikes around all day in complete comfort.