I think I can add some value to this thread since my Dawgs played and beat both teams this year at home. :)
My gut feeling after watching all of the UT/OU and GT/OSU games this weekend is that Ohio State's about 10-12 points better than UT. They don't really have a major defensive presence or much of a rebounding presence when Chisim is out of the game - although he is quite athletic with a nose for the ball.
UT's guard play is much better than Tech's and you likely won't force as many turnovers as you did against the Jackets, especially with the 3/4 court press. However - they are shorter and less athletic - so you'll probably force more bad shots from the guards.
Deebler (sp?) is a bad match up for UT since he's so tall and lanky and will likely shoot over anyone the Vols play on the Perimeter. Turner's a matchup nightmare especially on the blocks since he'll draw fouls on Chisim if he guards him and he'll abuse anyone else.
Pearl is a nut - but he's a much, much better coach than Paul Hewitt. He won't waste timeouts and will make adjustments via personel and scheme.
Good luck! Other than the UK/Cornell game - I'm most anxious for your game.