Uncle Pug:
It all depends on what you are doing... kinda like walking. Are you walking to the mailbox? Are you strolling through the garden with a cup of coffee? Are you carrying a heavy package upstairs? Are you the mailman running from a dog? Are you... well you get the point.
So... what are we doing?
I spent years on swimteam. Years. Like from 6 to about 17 or 18. Cal Novice, AAU, in the pool 5 - 6 hours a day, the guy with the green hair all through school, etc. Hundreds of trophies and ribbons and rot gathering dust at Mom's.
My best stroke was Breast. But swimteam frog kick and scuba frog kick are way different. Same muscles, different position in the water.
Most of my dives, I don't lead. I follow. I shoot. I support, I rarely lead. Once in awhile, I lead. On one such occasion recently, after a few minutes, Arnaud grabbed my fin and looked at me like, "What's the rush..." I never realized I was just bookin' along, but I was.
Same kick - different task. With nobody in front of me, I was just kick-kick-kick... with someone else leading, I sort of kick-glide-kick-look-at-the-fishie-kick... When Arnaud leads, he's so laid back I usually mod-frog and keep up fine.
I mod-flutter thru kelp. Frog in open water. It all depends on what you want to do. Having several kicks in your tool bag rules.
K