Do digital tests need more HCG to be positive?

Question

I had tested with a cheapy and it was VVVVFP so I took digital this morning and it said not pregnant?

Answer

I had clear positives three days ago but digital said not pregnant. Yesterday the digital came up pregnant. If this helps. Way a few days until the line is darker than take digital. 
Three days ago

Yesterday

Answer

This was mines at 8DPO

And 5 min later I did digital too👇🏻

I personally trust/believe more digital tests

Do digital tests need more HCG to be positive?

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