Is this a chemical ? 😩

I took this test last night w 3 hour hold and I’m pretty sure it’s not an Evap, it’s clearly blue.

Then I took his one this morning with FMU and nothing.

The only thing I can think of is it being a chemical or because they are two different brands and one may be more sensitive. The top was Rexall one step and I believe the bottom was equate. Any thoughts? I tested this First Response Rapid Results but it was negative. I’m 10 dpo btw.