Apple juice for Welch's White grape substituting

[DumpsterJedi]

So I have been toying with the idea of subbing apple concentrate for welch's white grape as a base in my Tomato Wine recipe, I have made wines from both that have turned out well on their own and at least my apple doesn't seem to really "distinguish" itself when I use it to top off whites every once and awhile. I wondering if anyone has tried this or has any theorectical input on why I shouldn't try this. In case any one wonders why, I have access to large quantities of free apple concentrate, rather than raid the grocery store.