As Duke and Houston prepare to battle Saturday night in San Antonio, the story of the Final Four matchup between these No. 1 seeds is a contrast of two basketball powers at different stages of evolution.The Blue Devils (35-3), appearing in their 18th Final Four and seeking their sixth national title, are the blue blood du jour. They’re the ones with the presumptive No. 1 pick in June’s NBA draft, and the team many believe is the best in the sport.The Cougars (34-4) have made their seventh national semifinal, on par with the likes of Villanova and UConn. But the program most associated with “Phi Slama Jama” has yet to win its first national championship, and this season Houston has not enjoyed the same attention as Duke or the Southeastern Conference despite winning 17 games in a row.J’Wan Roberts, in his fifth season at Houston, said this week that being overlooked suits the gritty Cougars just fine.”We’re probably not the big-name school or whatever. We’re just Houston, in Third Ward,” Roberts said. “We probably don’t get the respect that we need, but I think that’s something that puts a fire under us and us keeping a chip on our shoulder.”Roberts was a freshman on the Houston team that made the 2021 Final Four. He’s blossomed into the Cougars’ top rebounder (6.3 per game) and vocal leader. The forward is one of four Cougars scoring in double figures (10.7 ppg), behind L.J. Cryer (15.4), Emanuel Sharp (12.7) and Milos Uzan (11.6).The main X’s and O’s question of this Final Four matchup is how Houston’s No. 1 KenPom defense will counter Duke’s No. 1 KenPom offense — and how Duke phenom Cooper Flagg will fare against the Cougars’ man-to-man.Duke has shot 56.2 percent from the floor and 47.3 percent from 3-point range this tournament, averaging 91.8 points per game. Houston has allowed just 37.6 percent shooting and 24.0 percent on 3-pointers in four games, allowing only one opponent to exceed 60 points.”You talk about five guys moving together on defense, they’re the best at it,” Duke coach Jon Scheyer said. “They’re the best at it no matter what you do. You really have to take advantage of that window of opportunity, and then you have to go north-south. You can’t be going east-west against these guys.”Flagg (18.9 ppg) can score in bunches, but Houston’s lengthy frontcourt of Roberts, Ja’Vier Francis and Joseph Tugler may prioritize neutralizing him and lob threat Khaman Maluach.Then the Cougars must deal with a Duke backcourt of Kon Knueppel, Tyrese Proctor and Sion James, all of whom are 40 percent 3-point shooters or better.