Firstly, thank you for posting. It was an absolutely joy to watch each of these clips. All of these performers (the men included) are fantastic and execute the choreography expertly. Even my least favorite of the five still dazzles.
Watching them back-to-back, I'm reminded of the differentiation many critics made between "classic" (or old) Fosse and "new" (or contemporary) Fosse when the review first hit Broadway.
I see the "classic" Fosse style as being epitomized by Gwen Verdon. All the technique and precision is there, but it also emphasizes a fluidity that feels very graceful and balletic. I see the "new" Fosse style as being epitomized by Bebe Neuwirth. Although there's still balletic grace, what's emphasized is a certain athleticism--the hits are harder, the isolations are more punctuated. I would argue that Ann Reinking is not only the bridge between these styles, but the dancer who best balanced them. To be clear, the same ingredients are present in all of these sub-styles and in all of these superlative dancers; it's just that the rations are a bit different.
I see Liza's delivery as the best in the classic style, and Shannon Lewis as the best in the new style (although Reva Rice is also extraordinarily impressive). Liza dances with an ease that very much reminds me of Verdon. Lewis dances with a clean exactness that very much reminds me of Neuwirth.
But how lucky we are to have video footage of all of them.