F1 hybrid variety

[Penellype]

I didn't think F1 hybrids were that precise, though?
As far as I was aware, F1 hybrids were offspring of two specific named parent varieties (these parents usually aren't commercially available, of course), not two specific (i.e. genetically identical) parents? That is, the parents are just grown from seed themselves, and so although all examples of Parent A will always be very similar, being the same variety, they are not genetically identical to each other, and therefore the offspring between the two parents will also not all be exactly the same as each other.

The parents of F1 hybrids are not genetically identical, but they breed true for the specific traits you want. So if you want an orange cherry tomato one of the parents will always breed true to orange, and the other will always breed true to cherry, but the 2 parents may be very different from each other. There may be variation between the individual parent As or Bs but not in the gene(s) that you are interested in.