Posted: 12/08/2014 at 10:36
I don't know if it's any help or not, but this is my HF Young, flowering in May of this year. It hasn't any flowers at the moment. Planted 2 years ago.
And this is Will Goodwin, flowering now (planted this spring)
Not a brilliant photo but it's very windy out there at the moment.
I would have said that Will Goodwin is a paler blue than HF Young - both flowers are about the same size.
But looking at your photos, I think the petals on your clematis are rounder at the tips than either of mine.