No, not THAT kind of bars...
HANDLEBARS

I have noticed that I wind up with back pains after riding for about 2 hours. I have read on here about how different handlebars may be the answer to my ills.
Some have stated that Heritage style bars make a huge difference.
If I understand correctly they provide a 3" difference form the standard bars on a Road Glide.
I have also seen that the reduced reach bars for a Road King will give you about 2" of relief.
The difference, I have been lead to understand , is the ANGLE of the grip end.
Is one more srtaight [perpendicular] to the center-line of the bike than the other?
Due to a wrist injury from falling off a tractor 17 yrs ago, I am much more comfortable with my left hand more straight from my arm, than with the slight outard angle needed to grasp the left grip. It may not seem like much of a deal to most, but for ME, and my left wrist, it gets to be quite uncomfortable after a while
So, which bars Road King reduced reach or Heritage style?
Anyone else have any experience with both, and know if there is any angle difference at the grip end?