This is more for fun than anything else. It is always intriguing to see the games laid out like this. Here is what UNC has done versus Duke in the Roy Williams era in tempo, efficiency, eFG%, TO%, OR% and FTR% on both ends of the floor.
||Location||Tempo||Off. Eff.||eFG%||TO%||OR%||FTR||Def. Eff.||Def. eFG%||Def. TO%||Def. OR%||Def. FTR|
Stats via KenPom
Williams is presently 10-13 against Duke at UNC but just 3-8 in the last 11 games spanning the past five seasons. UNC has matching 5-6 records at home and on the road against Duke in the Williams era with the Tar Heels dropping the only neutral court affair in the 2011 ACC Championship. The home and road records are remarkable in that one would expect the road record to be a tad worse and the home record a bit better.
If you had some expectation that the numbers would produce some pattern or there being a telltale stat that should it happen then one team wins you will be disappointed. For one, there is significant personnel turnover over 23 games which means every game or every two games stands to be different. Even more than that, it's the ultimate rivalry game so in that respect every game really is its own chapter and resists predictability.
The only real consistency is the tempo with only 8 of the 23 games below 70 possessions. However the last three contests have failed to crack 70. The other consistency is the offenses are generally good but not great. There has only been one game where both teams were under 100 for offensive efficiency. UNC has been over 110 seven times and Duke just four times in the 23 games. UNC has the worst OE games of the series with four under 90. Duke's worst game was 91.5 in the loss to UNC in 2006.