Some years ago, when Crimson Crush first became popular, I tried re-sowing the seed from a saved tom for two seasons. So, I had the original plant, saved a couple of the toms from it, used the seed the following year,and did the same the third year with the second year's seeds if you see what I mean, (?)...
I finished up with two completely different plant varieties, one easily survived a nasty blight attack on the allotments, where we all got hit, but the other strain just keeled over and died off as they do!
The survivor had totally different leaves and fruit size, but was pretty bland in taste and smell, but better that nothing - like those you describe above! The original notes and pics are here somewhere, but I can't find the post...
P.S. Found it!
https://chat.allotment-garden.org/index.php?topic=125424.45It did go on a bit though...:0~