The big difference is the converted cameras are faster, and you can see through the viewfinder. When I put the R72 filter on, I can't see anything. So that use is strictly tripod-only. The color ir filters give more tonal information to make a BW out of, and you can make funky color photos. For instance, when I convert my D600 files to BW, the red, orange and yellow sliders are the only color sliders that have an effect. With the color ir filters, you'd have more color that you could adjust in the conversion, and there might be less of a chance of banding, not that I've seen any so far in my limited use with a filter on lens method. Lifepixel has sample photos made with the different filters on their site.