I think the bottom head lower gives a crispier sound with more snare definition, and the reso much higher gives more body from the drum. I'm certainly not expert, and I haven't played orchestral music since college, but my experiences tinkering with my own snares has led me to this conclusion.
So, maybe the orchestral players want to hear more snare, and the kit players want to hear more shell? That would be my guess.
Hosting an open jam gave me the opportunity to hear a lot of different snare drums tuned a lot of different ways, all played in basic rock/blues/pop style. What I noticed was that people who tuned the reso lower got a "chk" sound on the backbeat, while those who cranked the reso got a more solid "TOK" sound. They also tended to have more overtones sometimes, so the drum sounded "ringy" from the audience.