A few days ago I was in Mobile Alabama, looking and listening to a Hammond XK System. The musician was told that it sounds just like the Hammond New B3 Organ. The fact is that it has a similar sound but it does not sound just like the New B3. If it did there would be no need for the New B3 at about doubled the price or more than an XK System. The same is true to be said about the New Hammond Mini B.
The New Mini B & The XK Systems is designed to give you a more affordable B3 type of organ sound that is also transportable; they only have some of the features and or technology of The New B3. For instance they do not have the patented multi key contact system as the New B3 does that replicates the original B3 organ. Just this one difference alone will make it sound different from the New B3 or Original B3.
The Mini B & XK System can be used in the church setting keeping in mind they do not have the same audio output, regardless of which Leslie Speaker is used to amplify them. They will not give you that full sound presence you are listening for when playing the bass pedals or pressing the expression pedal for more volume.