ADL5569 single-ended input

I saw “ADL5569 evaluation condition”.

My customer wants to evaluate the ADL5596 with a single-ended input.
The note in the figure states that R4 should be 25Ω for a single-ended input.
This seems to me far from the calculated value.
Is there a professional tip where 25Ω is preferred over 22Ω over 33Ω?

Best regards