I saw this bush yesterday. It has lots of white flowers, but doesnt seem to have a smell at all. Do you know its name?
It looks like you show two different plants on your pictures. The plant on pictures # 1, 5 and 6 looks like Deutzia crenata 'Plena'. The plant on pictures # 2, 3 and 4 looks like Dutzia as well, but am not sure of the species.
Multiple different double deutzias have been named and circulated in the past, I wouldn't be confident this was any particular cultivar without matching it with a living specimen in a collection that was thought to be accurately labeled - I have looked into these shrubs in the past and they are one of those groups where found examples do not necessarily fall into place readily, the literature not being very adequate.