The description fits Hagley Hybrid. "Tends to bleach in full sun". The newly opened ones will probably look like the other one soon. The flowering period is later, but your weather might have boosted it.
Take note of the pruning requirements, you need to do it correctly as there are different types which are pruned hard or only 'tidied up'.
http://www.clematis.hull.ac.uk...
http://www.clematis.hull.ac.uk...
