Hi Charles
The soundscape is larger with the Nenuphar’s, as one might expect. The Mini Nenuphar’s would be the choice for medium to smaller spaces and I can see this being the preferred choice here in the U.K.
The sound qualities are similar, both being very open, the feeling of a directness between you and the music, a calmness that allows one to get absorbed into the music. I feel that transients are perhaps dealt with a little better with the Mini, perhaps due to a lower moving mass.
The cabinet designs are similar being TQWT, the Mini cabinet dimensions being smaller. In theory the 10 inch version should produce a lower bass end but in our medium sized listening room I certainly have nor felt I’m missing much if any bass extension.
Due to the revealing nature of these speakers, as has been said by you and others, amp matching is very critical. Don’t assume though that these speakers are for SET’s only. There are some SS amps that clearly work extremely well with them. My own experience with the Bakoon 13R, echoes the praise that Srajan of Six Moons has mentioned about this combination. There are other SS amps that might be compatible as well, like First Watt, Trilogy and possibly Grandinote.
Please ask if there are any other questions.