Time for me to jump in here...
Not all 1990+ J-body digital guage clusters are the same. Physically, they are identical. Logically, they changed for the 1992 model year. There was a class II communication bus blitz that came with the different manufacturer of engine computers as well.
For this cluster to work in a 1993 Daytona, the guage cluster has to be from a 1992+ Lebaron. OR the car has to be converted to 1990-1991 electronics which is quite a bit of work.
Yes, the digital cluster requires fewer wires because of the data bus control. RPM and speed for example do not need their own input wires like the analog cluster does. All that information is on the data bus circuit. Also, I believe the mileage is stored in the SBEC
some how. I am unsure of how this works, but I sold a 1990 digital cluster to someone locally who plugged it into his '91 Lebaron and it worked. Odometer showed 91k miles, which is what he believes his car had. I have no idea what kind miles were on the junk yard car that this cluster came out of, but it'd be a heck of a coincidence for them both to have similar mileage. The mileage could be stored in the Body computer for all I really know.
I am pretty certain (its been a few years since I've studied it) that you need the premium body computer for this cluster to work as well.
I found a 1992 Lebaron LX in the yard last December that had the full EVIC system. I pulled the entire wiring harness out of the car, took the engine node module, EVIC module, digital cluster, premium body computer, etc. For my use, it HAD to come from only a 1992 car because it had the updated class II communication bus, and hideaway headlights. It is the only year this was available, so the premium 1992 J-body body computer is rare. One day I will get around to install it into my '92 GTC vert. But wait. It also has a lamp outage module, and the GTC's have different tail lights. GTC's never came with the EVIC system, so I need a lamp outage module from a 1993+ EVIC equipped car blah blah blah blah. In 1992, only the GTCs had those updated tailights. In 1993+ they all had them. Just a little monday evening frustration for y'all.