Wilt - if one had reliable electronic feedback in their colorhead, Ciba had the advantage of being somewhat tolerant of minor dev temp variations, say, plus or minus 3 degF or a little more. Furthermore, typical dev times were 3 min, except for the less common P3X hotter commercial process - so not as fussy in that respect either. Ciba was also a comparatively long exposure scenario.
But when it comes to the now predominant RA4 process, we're talking about faster dev times, often fast exposures, etc - so print to print consistency can be more of a challenge in the home darkroom. And due to the fact they're engineered for relatively low contrast color negs instead of chromes, the spectral sensitivity peaks of the paper dyes themselves are quite steep, and fussier to keep on track. While a 4 cc dial setting difference might be only negligible with Ciba, even a 1 cc change might make a conspicuous difference with RA4 paper (if one is attentive to or fussy about the exact look).
Same goes with color correction and contrast masking; with Ciba you needed a heavy-handed sledgehammer approach. With color neg printing, if needed at all, masking is more like power steering, and you need a gentle touch.
The big problem with Ciba, other than its handling issues, was that the product shifted color balance rather quickly - quite dramatically in fact if we're talking about six months. It wasn't just a matter of batch to batch issues. It would go from a greenish bias when new to a magenta bias when old or "ripe"; so I'd schedule my specific images for their best fit within that inevitable cycle of shift. You couldn't just rebalance or re-mask as a cure - the different coating layers responded differentially. But sometimes that very idiosyncrasy produced the most gorgeous prints.
RA4 papers are far more consistent, at least until they're outdated enough to start yellowing and going blaaah.