Zeus centre-pull brakes tend to follow the Universal/Weinmann school of design, unlike the MAFAC, which are much more adjustable. The greater adjustments of MAFAC means the brakes can be finely tuned in the hands of a knowledgeable mechanic but in the hands of a novice it can also lead to deterioration of performance. The Zeus are much simpler and somewhat mistakeproof, leading to more consistent performance in the hands of a novice mechanic.
MAFAC centre-pull have always had a reputation as good stoppers but I've always credited much of this due to the larger contact area of the OEM pads. Modern pads and housing tend to be a great equalizers when it comes to C&V brake performance. When it comes to these old centre-pull, I also find that rider preference has as much to do with lever ergonomics as actual brake performance. You really should do extended tests with both, to decide which is your preference.