Wondfo vs Pregmate OPKs who wins?

Alright so here is my review of Pregmate vs Wondfo brands of OPKs. When I first started using OPKs I bought Wondfo. Well, i went to buy my second batch and accidentally bought Pregmate. No biggie right? Wrong.

Wondfo always gave me a superrrrr solid bright red positive. Wondfo has given me equally dark red lines, which on the box says is positive. Alright so here is the problem.... the Pregmates looks exactly the same on my Peak as they did 8 days before. The top picture is taken with same urine, not at Peak. The second photo is my peak day with Wondfo showing a clear positive and Pregmate looking exactly the same as the one prior.

Feeling super annoyed that I missed two cycles of timing BDing because I stopped testing to soon with a false positive from Pregmate. Hopefully any of you ladies searching for thoughts on which OPKs to buy see this!