I just spent a few seconds there, but I don't see any "installed" pictures.
All I have to say about those bulbs are that they will not compared to a complete board that fits in that location. LED's don't disperse light very well (disputing what that sight says) and the 1157 LED bulbs I've seen in action confirm that. All you see through the lens is a really bright ring that is the LED "bulb", which doesn't illuminate the rest of the housing very well.
With a large "board" designed to fill the undereside of the lens, there is nothing BUT LED's, so it doesn't end up with just one bright spot.