I’m so confused! (Pregmate brand OPK)

Kelly

Unlike other brands; these Pregmate brand opk’s directions read that if the test line is the same OR darker than the control then expect to ovulate within 24-48 hours. Welllllll..... these all look the same to me! The last two look a little darker, maybe?

With my previous brand of OPKs, the test line would show considerably darker than the control line. Does anyone have any thoughts? I’m so confused, lol!