Are Hedera helix and Hedera hibernicus the same?

Scientists say these two species of ivy are distinct species, but I have seen ivy looking very like both of these, growing on the same plant. There also appear to be leaves looking like mixes between the two, growing on exactly the same plant as the other leaves.

This appears to show that they are not separate species at all, but instead, subspecies or genetic variants of the same plant.

I have just planted some seeds of the ivy in question, whether they will look like Hedera helix, or Hedera hibernicus is probably just a matter of chance. I will just have to wait.