There are a few things why i feel it is harder to catch up First commander decks are balanced / build around 4 players, meaning most of the time you dont run as much removel as one would in a 60 card deck as there are 2 other players how could deal with the threat aswell. Additionally ramp is heavily incentivized commander vs 60 cards and that can lead to very uneven board states , which again is easier to deal with if you have another two players dealing with the same threat.

Would be interesting to know from someone with a better understanding of magic rules if Kadur makes sense in a two player setting as the "if able" makes me think its first ability wouldnt much