They do seem similar in color but not when they are just budding.
Somehow we ended up with 2 different whites, not that I'm complaining, it's a nice accident.
The largest of these is slightly taller than I am so just over 5ft. They grow much larger and much wider than ours are at this point. We enjoy seeing them through out the winter as they keep their leaves where other plants of ours are only sticks. They do like a more acidic soil so we do amend it from time to time. Other than that we just enjoy the lovely spring flowers!