Reading are nowhere near the same club since moving from Elm Park, or ever since the Madjeski era. Unlike Oxford, Swindon, Rovers, Luton etc etc, Reading have become infiltrated with plastic 2 team fans who have probably never even heard of Elm Park, it's a major family club with very very few die hard fans, which is reflected in their miniscule away attendances. Mocked universally by other Championship clubs for being just tedious, characterless and passionless.
As someone who lives between Oxford and Reading, there's always banter but it's hard to find a real "hatred" there anymore, they're just a bit "meh" these days. I'd put the other clubs mentioned previously above them in the present day. Although an away game there would be superb, as I'm sure we'd sell out 4k+