thats hard to call - the issue being that factory correct restorations are not really a big deal to 90% of bronco owners, they could care less - unlike, say vintage mustangs, muscle cars, etc - if that WERE the case, then yes, they would be worth more than a similar condition bronco - it would be worth more to factory restore it than custom mod it. the fact that it has PS/AT and sport chrome trim probably adds just as much as the DB package - some of these were Rangers too.
there arent really enough of them out there to make a call - it was a 1-off run of less than 50 vehicles. i've seen maybe 10 FS thru the years (i bought one of them) and they all seem to be asking a slight premium for the DB package, more tied to the Stroppe lineage than a DB package. along that same thought... IMO, the 73-75 Stroppe's arent that big a deal either after they came from the factory eq with AT/PS, BUT they still get the Stroppe price because of the cool paint. all they were doing post-73 was cutting the fenders, putting in a RB, dual shocks and adding rims & bigger tires - nothing most werent doing already when they drove off the lot....