I saved some Crimson Crush seed one year, News, and although they were supposed to be F1, I tried the seed the following year.
I finished up with two very different varieties, one which succumbed to blight as usual, the other famously stayed the course!
There's a post from a couple of years ago somewhere, but I can't find it - it's not really worth searching any more, as the pics are just 'pics' of toms, but the leaf formation was very different!
Worth a try methinks, but the toms weren't all that special flavour-wise, although, of course, were better than none!