The phrase "any difference whatsoever" is correct and usable in written English.
It can be used to emphasize that there is no difference at all in a particular context or comparison.
Example: "After reviewing both proposals, I found that there is any difference whatsoever in their overall effectiveness."
Alternatives: "any difference at all" or "no difference whatsoever".
They don't make any difference whatsoever.
I don't think it [the draw] makes any difference whatsoever.
Isy Suttie: If you mean make a long career out of it, I don't think there's any difference whatsoever.
The Japanese wrestlers themselves have no concept that there's any difference whatsoever between them and the foreign wrestlers.
Obviously, this will be a race that is fought completely on the issues, and personalities will not make any difference whatsoever.
The new Congress will have a few more Democrats in the House and Senate, which will not make any difference whatsoever.
I am unaware of any evidence that the site of neurite attachment to the soma makes any significant difference whatsoever to the simulation of electrical signaling in neurons.
"Speaking bluntly, what I think, what any of my colleagues thinks, may make no difference whatsoever because Donald Trump has said he's going to block this merger, and I take him at his word," Sen. Richard Blumenthal (D-Conn).
It makes no difference whatsoever, as that same block doesn't show any weird coloration or pixelation when the phone is turned on and working.
If it has no effects and makes no causal difference whatsoever, then it would seem unable to play any significant role in the systems or organisms in which it is present, thus undercutting at the outset most inquiries about its possible value.
However the only way tomorrow's result could see this deficit overturned to Cameron's favour is if his bloc wins seats from the Miliband bloc – any exchange of seats between the Tories and the Lib Dems would make no difference whatsoever to the overall arithmetic.
