Having grown all 3, RP was my winner because it had yield, flavor and potency...having said that, Docs Ghost was the strongest but lowest yield, I had some variation in the phenos but all yielded pretty low, the pheno that looks like the ghost cut has amazing OG taste and potency and not a damn 1 took less than 65 days.
Cali Connects imo is the one that is the most different but I've only grown the tahoe ( still have beans for larry and deadhead so we will see ), I had phenos that were dominant to both the Tahoe side and the SFV side, very high yield but the potency was no where near RP or the Ghost and the flavor was very different...good but not what I know as the OG flavor.
As far as stability in the seeds go....RP seemed the most stable, only saw 2 main pheno's, Doc's Ghost I had 3 very different pheno's, CC's Tahoe was all over the map and I had an auto flower.
So my rankings are:
Potency: Ghost > RP > CC Tahoe
Yield: CC Tahoe > RP > Ghost
Flavor: RP / Ghost ( tied ) > CC Tahoe
Stability: RP > Ghost > CC Tahoe