These GSSUSA lights are bright and work well as advertised. It's easy to install although you do have to get the correct polarity. The Cougar brand can be plugged in at any position.
In comparing the brightness of both brands, GSSUSA shows to be a little bit brighter than other brand . But even with that difference, some are cheaper (which is a bit cheaper) does the job anyway. It definitely makes a big difference compared to the halogen stock bulbs.
I bought the H11 size for my 2018 Toyota Tacoma. Unfortunately, the set is a big bigger (has a bigger fan) and it couldn't fit in the low beam area (as shown in the picture). It does fit well for the high beam.
Overall, both sets are great and you can't go wrong with either one. I slightly prefer the set and would love to use that as my low beam if it would have fit. TheGSSUSA set also seems to have a better quality of construction although that could really be cosmetic.