While the Tykes have moved into contention for the playoffs, Blues remain just three points above the drop zone despite collecting seven points from four games.
For every week that Barnsley spend in the race for the top six, hope is turning to expectation for the club's supporters as they begin to dream about an unlikely return to the Premier League.
Valerien Ismael and his squad will relish the opportunity to remain as underdogs in competition with clubs who have budgeted for promotion to the top flight.
Nevertheless, six successive wins, the latest coming against Queens Park Rangers in midweek, has put the Tykes within three points of fifth spot.
Barnsley scored three goals at the Kiyan Prince Foundation Stadium, their best return since the end of October.
As far as Birmingham are concerned, they make their second trip to Yorkshire in the space of a week after claiming a 1-1 draw at Huddersfield Town on Tuesday night.
Aitor Karanka would have expected more against opponents who have lost their way since the turn of the year, but it represented another point claimed from a losing position.
There could have been few complaints with the Spaniard's team selection after he recalled playmaker Alen Halilovic to his starting lineup, a reward for the Croatian's sublime winner against QPR at the weekend.
However, with Rotherham United just three points behind Blues with two matches in hand, Karanka may have to reconsider his plans now that the club are a defeat away from dropping back into the relegation zone.
Barnsley Championship form: WWWWWW
Birmingham City Championship form: LLWLWD
Despite having an extra day of recovery, Karanka may still look to make changes to his Birmingham side.
Barnsley boss Ismael is expected to rotate for Saturday's game, bringing in the likes of Michael Sollbauer and Morris.
Herbie Kane is also an option in midfield if Ismael opts for fresh legs due to the three-day turnaround.
Barnsley possible starting lineup:
Collins; Sollbauer, Helik, Andersen; Brittain, Palmer, Mowatt, Styles; Chaplin, Morris, Woodrow
Birmingham City possible starting lineup:
Etheridge; Colin, Roberts, Dean, Pedersen; Gardner; Sanchez, Halilovic, Sunjic, Bela; Jutkiewicz
We say: Barnsley 2-0 Birmingham City
Birmingham have performed better against the top sides this season, something which will only encourage them ahead of their trip to Oakwell. However, we are backing the home team to continue collecting maximum points, keeping a clean sheet in the process.