[airair]

I don't know the origin of this either (Copy of a copy from my lap top) If it deserves deleting - so be it.

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There are ONLY two ways you can move an object. You can either PULL it or PUSH it.

A swinger moves the club by PULLING it with the left arm. No right arm force applied.

A hitter moves the club by PUSHING it with the right arm.

Iron Byron doesn't have a right arm (I hope) so the club is not being PUSHED, so one must conclude that Iron Byron is a swinger because the machine is PULLING the club into impact.

Still not convinced? Below are a list of the differences taken from a post on another TGM forum to expand the obvious differences even further.

Swinger vs Hitter
Pull vs Push
Longitudinal Acceleration vs Radial Acceleration
Rope Handle vs Axe Handle
Centrifugal Force vs Muscular Thrust
Whirl back vs Muscular Carry back
Quick vs Strong
Stretched Muscles vs Contracted Muscles
Loose vs Stiff
Pitch Basic Stroke vs Punch Basic Stroke
Spin vs Drive
Right Shoulder Flywheel vs Right Shoulder Backstop (Launching Pad)
Pivot Thrust (Momentum transfer) vs Power Package Thrust
End vs Top
Top Arc vs Straight Line
Quick Start Down vs Slow Start Down
PP#3 Top Side vs PP#3 Aft Side
Standard Wrist Action vs Single Wrist Action
Sequenced Release vs Simultaneous Release
Right palm 'on plane' vs plane 'through' right palm
Wrist Action vs Hand Motion
Drag Loading vs Drive Loading
Throw Out vs Drive Out
Start up and release Swivel vs No Swivel (except after Follow Through)
Wrist Throw vs Right Arm Throw
Arc of Approach vs Angle of Approach
Wheel Rim vs Wheel Track
Horizontal Hinging vs Angled Hinging
Full Roll Feel vs No Roll Feel
Draw vs Fade
On-Line vs Cross Line
Plane Line Rotation vs Grip Rotation
Soft hands vs (Relatively) Firmer hands
Standard Address vs Fix Address
Accumulator #4 vs Accumulator #1
Physics vs Geometry
Let it happen vs Make it happen
Mike Finney (Mikestloc) vs Ted Fort (YodasLuke)
Elegant vs Not so elegant

A hitter will generally grip tighter than a swinger because a hitter is 'fighting' rotation, and a swinger is 'allowing' it.
Imagine you were to swing a hockey stick like object, but with a very long blade. All things being equal, the blade will align itself with the direction/plane of force (why people slice, in part). A hitter resists the blade rotation and must provide a firmer grip to do so. A swinger, by contrast, needs to create the 'throw out' force (rotation) that will square up the blade. You could also argue that a hitter might tend to be more upright, and a swinger more flat because of those conditions, although there are no hard and fast rules there IMO.