cheapoes vs fr

Want my rainbow 🌈
So I have been taking cheapies for a couple days there is a really faint line. So this morning I took a first response and a cheapie now the line one the cheapie has gotten a slight bit dark but there's nothing on the fr. My question is, are cheapies(the easy @ home ones) more sensitive than fr? Here's my tests from today don't know if you can see the line one the cheapie in the picture 

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