All of them are street legal as a replacement fog, and all of them are strong choices at their respective price points (and true bargains when they're on sale). In fact, the 3 of them are the top recommendations in the fog pod shootout thread here, besting other brands like Rigid, KC HiLites, and Baja Designs:
The LED SAE J583 Fog Pod & Fog Light Review | Tacoma World
The sport is a great value with excellent intensity and coverage. The pattern also meets the newest J583 F3 spec with its sharp focus and cutoff. They use about 15W.
The pro uses larger, more powerful chips (more than twice the power, 36W) which results in a brighter, but less focused pattern (the emitters are larger than the focal point of the optics, which loosens the pattern somewhat). They still meet the older J583 F spec, so they are still road legal. They also run warmly enough to melt snow, which has long been a failure point for LED pods.
The max SS3 uses new Osram Boost HX chips that have insane amounts of intensity, but with the smaller chip footprint like the sport LEDs. So their intensity is greater than the pro but with the focus and cutoff of the sports. The chips themselves are rated at 20W each (80W), which would be insane- but the heatsink capacity of the lights limits the pods to about 38W. They too will melt snow, and meet the older J583 F spec.
Personally I find the white lamps to be a touch too blue, so I prefer the yellow ones for fog use. For my driving lights (street legal auxiliary high beams) in the grill, I use the SS3 driving pattern. For a warmer 4000K white, I used the yellow lights and swapped in clear optics. Everything on the front of the truck is street legal (the roof lights are off road only).
