I don't think anyone is suggesting that playing Ole Miss is the same as playing Alabama, or that Vandy has a tougher West schedule than Tennessee.
I'm comparing Vandy under Franklin versus Vandy prior to Franklin's arrival, in an attempt to help the OP understand why Franklin "gets so much love", only he doesn't want to understand.
Using your Ole Miss example, Vandy trails the all-time series against Ole Miss by nine games, and that's after Vandy won the first NINETEEN games from 1894-1928.
Since then, Vandy's had the following losing/winless streaks against Ole Miss:
19 games (0-17-2) from 1952-1973
6 games from 1975-1980
6 games from 1985-1990
6 games from 1993-1998
5 games from 2000-2004
Conversely, since 1928 Vandy's longest winning streak against Ole Miss is THREE games, and its only happened twice....from 1949-1951 and 2010-2012.
Ole Miss owns Vandy, like many other SEC schools. But playing Vandy under Frankin is anything but the automatic "W" it used to be.