It’s a Super Bowl of superstars, with Patrick Mahomes, Travis Kelce and the Kansas City Chiefs set to take on Christian McCaffrey, Nick Bosa and the San Francisco 49ers. Both rosters boast a bevy of big names, though some are playing better than others entering Sunday’s Super Bowl LVIII at Allegiant Stadium in Las Vegas. The 49ers, who rolled through the regular season en route to the NFC’s top seed, looked vulnerable in their two playoff wins, needing second-half comebacks to survive against big underdogs in the Green Bay Packers and Detroit Lions. The Chiefs, meanwhile, are peaking at the pe…