I'm pretty sure there's no difference writing multiple vars or one var with comma separated variable names (if that's what you're referring to).
I think it's purely a stylistic choice.

Also vars inside for loops etc. are hoisted to the top of the function scope anyway, so it doesn't matter where you declare them. Again, stylistic choice.

I'm sorry and at this point I cannot change anything with this kata besides the description because over 500 people have passed it.