As you've seen, many LED fog light bulbs offer a TON of total output, without much emphasis on the optical design, or where the LEDs are positioned. The SLF is designed to perfectly mimic the clean, controlled beam pattern of stock incandescent bulbs, while being FAR brighter and more focused.
Regarding the Supernovas, we actually haven't gotten a chance to do any side-by-side testing (hopefully soon). But, I can tell you for certain that the SLF will offer much more functional light output than standard high power LED bulbs!
Hope this helps!