HiVi vs. Dynaudio

I just do a search online, and it might require a minor change in crossover. But those inmates claimed that the HiVi performs better than the Dynaudio unit.

I'm not sure whether the HiVi is better but it makes sense to make small changes if those HiVi units are improved over the Dynaudio unit as they claimed. Improvement means difficult.
 
Rumour has it that Audio Technology has drivers that can be replaced the Dynaudio models? Is that true?
Midbass drivers - yes, they can design and produce just about any feasible driver you want. Note: the cone material is quite a bit better than (past) Dynaudio or HiVi drivers produce.

Problem is: they are likely to be more expensive than Dynaudio replacements.

Morel’s CAW 938 might also be viable except for the fact it’s less efficient than the HiVi.
 
My friend has sent a request to Audio Technology and here is their response:

."We do build drivers – also drivers that can replace the original drivers, but not without modifying both cabinet as well as cross over."

So we assume the physical size if the AT driver is very large, is it?