While I haven't heard the Zensor 1, I have heard the Menuets and the Lektor 2, arguably the Zensor's predecessor. Being both Dali standmounts, their sonic signatures are indeed comparable. Going by memory, I'd say that the Lektors had a slightly more promiment presence in the bass frequencies, but that may have been because of the room, not the speaker.
Why do you want to compare them? These speakers are not aimed at the same audience, neither in usage nor price.