There was great disappointment expressed when Monk left Leeds to join Middlesbrough at the end of last season, but Christiansen has shown signs of encouragement since taking over.
And Jansson believes that Christiansen has a more analytic strategy than his predecessor.
The Swedish international said: “He works hard at training. There is more analysis than last year and the training sessions have also been harder, so there have been a lot of differences.”
Christiansen has had difficulties at Leeds, but has benefitted from a more patient approach in ownership and Andrea Radrizzani has stuck by him.
Leeds are currently in eighth position in the Championship table, five points away from the play off places.
Monk, meanwhile, is badly struggling at Middlesbrough, with the Teessiders underperforming so far this season.
Boro are currently sat one point behind Leeds, despite going into the campaign as the favourites for promotion.
Monk is now facing growing calls for him to be sacked, with frustrations rising at the Riverside Stadium.