http://www.fishingtn.com/attachment....6&d=1554261028
The top fish has 2 vertical stripes with a very pronounced diagonal stripe across 3rd vertical strip. I do not see the pronounced diagonal in the second fish. However a lot of the markings are in the right places... I'd say a better chance of the fish being from the same brood of eggs or same female.
Like TnWalker suggested maybe notching or nipping a fin ever so slightly where only you would notice