looks like one of the tardiva

But the bloom is round...not long/cone shaped like I find when I search tardiva.

It's a paniculata variety, but we wouldn't be able to tell which because you didn't post a pic of the blooms.

But as a general rule, popular varieties would go as such:

Grandiflora - blooms go from pure white to pink
Limelight - blooms go from greenish creamy white to pink

Since it produces a mop-head flower and is not red-stemmed plant, that rules out a bunch.