Hi Doreen, The difference between most of theMortgage Lifter strains, of which I have grown eight, is that the Red Mortgage Lifter V.F.N. has more disease resistance, is more prolific, has slightly smaller and more even fruit while displaying a red color as opposed to the pinkof the others. The breeding and selection involved was by Jeff McCormack. I agree with you on the other varieties you mention. I think many folks say a tomato tastes good but they have nothing but the supermarket types with which to compare it. I often wonder "good compared to what?). The cardboard shipping box would tasteno worse than some of those. Home or locally grown hybrids are certainly a step upward but there is still another step that so many of us have never taken. I wish more people would give the tomatoes of our grandparents' day a try. There is a flavor there that must be tasted to be believed and there's good reason for it. When they hybrids came into vogue, taste was not a major factor and as a result it was lost in the process. Good gardening, Chuck Wyatt