That’s right, Ray. Totally different lenses. Yours probably have a lot of “flutes” in the lenses. Think of that as folds or pleats in the lens glass to take the extent of the light projected forward by the lamp reflector, divide the light into horizontal segments and focus each segment into a horizontal beam projected forward. That is what a fog light does. Looking through the lens, it is difficult to make out the bulb inside because of those segments in the lens.
OTOH, my driving light lenses have no flutes and are clear to look in and see the H3 bulb. The “spot” pattern projected forward is focused by the lamp reflector, not the lens.
This is the same for any company’s fog or driving lamps. Fogs are fluted, driving are clear. I actually have wiring in my Speedster for both fogs and driving, but since I don’t drive in rain or fog much, all I run are the driving lamps (and there isn’t a lot of lamp real-estate in the nose of a 356 to fit both and be effective, either).
Hope this helps. gn
Oh, and several pickup trucks ago I had a pair of Cibie “Super Oscar” 10” driving lights out front because we had a camper back then and would often head out Fridays up into Vermont to go camping. I could spot a deer at a mile away on I-91 with those puppies!