Thought I'd chime in here. I'm actually pretty familiar with both of these test strips and had similar results with them. Did you go off Amazon to buy these? I'm guessing so. I purchased 5 or 10 of each off Amazon due to the reviews.

Moral of the story though, I routinely got lighter test lines on the brand you have in the left in that picture, as it appears you did as well. I did multiple tests on the same sample with both brands, and that brand routinely was lighter, however, neither ever showed a fail.

Both your pics though are a pass regardless :thumbsup: