"few if any" vs "few, if any"

The phrase 'if any' is parenthetical, no matter what is meant.

A parenthetical phrase (which can be a single word or a quite long clause) adds meaning to the sentence in which it appears but is not a fundamental part of the sentence.

Parenthetical phrases should always be surrounded with punctuation either parenthetical commas, brackets or, in some cases, dashes.

This means, as Mozibur Ullah says in a comment above, that the first sentence is incorrectly punctuated. Changing the punctuation does not change the meaning.

In the above paragraphs the parenthetical phrases are written in bold type