TNP in grumpy old git mode it seems!
Judging from Arfa's description of the system he has, that does not appear to be likely in this case.
I take it you mean wideband? Most DTT installs will revert to grouped operation after DSO - they have attempted to keep the number of non grouped areas down to a minimum. In terms of channel bandwidth, the spacing and bandwidth allocated is the same, although the DTT signal uses the upper end of the channel more intensively than analogue.
Or the converse. "Difficult" installs that require pre distribution filtering and levelling are rarely even attempted by non expert installers. They are also difficult to conceive without proper test equipment.
Where did he say that? Did you get the bit about a trunked system with taps?
There are other differences as well. DTT is more succeptable to shot noise, and ideally ought to have fully screened outlets, amps, connections etc. Something that is not an issue for most analogue only distribution systems.
Again, this is an over simplification. Difficult locations and ones that require multiple transmitter operation may quite often need filtering and levelling. One may also require diplexers and other active components. That is before you get to the issues of injecting other sources like CCTV or door cams etc into a distribution system.
Other than where there should be that is...