I wasn't talking about Grace or the best players of the next generation like Trumper. I'm talking about Grace's peers in the 1870s, where he was consistently averaging 50+ and scoring 8 to 10 centuries a year, whilst the next best batsman averaged mid 20s and made only one.
My point was that Grace dominated more than Sobers because of the primitive techniques of his colleagues, not because he was necessarily a better batsman.
K.S. Ranjitsinhji on W.G. Grace in The Jubile Book of Cricket:
"He revolutionised cricket, turning it from an accomplishment into a science; he united in his masterly self all the good points of all the good players and made utility the criterion of style... He turned the old one-stringed instrument into a many chorded lyre, a wand. But in addition he made his execution equal his invention. Possibly Grace's most far reaching achievement was to master both forward and back play and draw on both with equal dexterity. Until his time, a man was either a back player like Carpenter or a forward player like Pilch, a hitter like E.H. Budd or a sticker like Harry Jupp. But W.G. Grace was each and all at once."
If we look at the batsmen who had scored over 5,000 runs in first class cricket at an average of over 20 up to the end of the 1873 season, we do indeed see a crazy discrepancy of much greater than Bradmanesque proportions:
W.G. Grace 10,669 runs @ 61.51 with 38 centuries.
Harry Jupp 9,987 runs @ 24.53 with 8 centuries
William Beldham 7,043 runs @ 21.47 with 3 centuries
George Parr 6,626 runs @ 20.20 with 1 century
Richard Daft 6,427 runs @ 29.48 with 6 centuries
Lord Frederick Beauclerk 5,442 runs @ 24.96 with 5 centuries
Bob Carpenter 5,184 runs @ 24.80 with 4 centuries