I know the ragwort on the left but the plant on the right is very similar but has different leaves???

It looks like a dandelion?

Are the flowers on the right plant small and yellow? Hard to differentiate between the daisy flowered ragwort and the other; like the right plant's flowers are lost in the other plant's flowers.
Should they be small, I'd guess some wild lettuce (Lactuca).

I think that the plant on the right is the same genus as the one on the left. I think it landed on a more fertile and friendly patch of soil.