4 games, and none of them have been howlers. In facf we’ve been better defensively in they 4 games than any other game this season. By a distance. Lowest xG conceded too.
Katic will never be as confident and competent as Bassey on the ball, bringing it out of defence or passing between the line. That is a certainty. He also does not have the acceleration or pace that Bassey has.
You then have to compare them defensively. Positionally, aerially, decision making, tactical discipline, and so on.
I already said its early days for Bassey, but he possesses some attributes that a modern day CB needs to go far. Katic does not.
Bassey may not be good enough long term either, but we’ll need to wait and find out. We already know Katic isn’t.