Here's one I took yesterday
I'm about to link you to my photo from the same cheapie test compared to my Answer.
I was 14 days late for period at time of testing, so god only knows when I o'd and how far along I am. I've been testing every other day so it definitely wasn't there before 13 days late.
Here's the $1 store cheapie (worlds tiniest pregnancy test to me...)
I didn't even believe the line was there. And that was with First morning urine!!
Then I took this one about 3 hours later... it's Answer brand.
So all tests definitely have different sensitivity.