The drag has nothing to do with the winching power of a reel.
The drag is a device that lets the spool slip before something breaks... the line, the rod, the gears in the reel, etc.
The larger drag on the spinning reel would allow the drag to slip at much higher weights than a smaller drag (spinning or casting).
Doesn't make it more efficient to crank though.
Its the line making that right angle turn onto the spool that makes the spinning reel work harder.
You can really use either, because when fighting a fish, you are able to pump the rod up and then reel down lessening the need for the more efficient winch.
But, if you were bottom fishing on a boat in the ocean, with 8-12 oz sinkers, you'd appreciate the better winching abilities of a revolving spool reel, every time you had to check your bait.
Like those big Penns you see on all the charter boats.
I'd rather pick the reel based on how I was going to fish.
Trolling, throwing weight & bait, distance casting, casting and retrieving lures...
Hope it helps
