Softer Grips and Throttle Extender or Twist Grip?

My hands get sore while riding and I’m wondering if softer grips would make much difference. Pro-Taper Pillow Top ATV Grips have good reviews at Rocky Mountain.com. Any other suggestions?

My right hand gets more sore than my left and that is probably because of the squeeze from my thumb pressuring my fingers. For this I’m considering a twist grip. The Handy Throttle from Cabela’s seems popular. It is a twist mechanism that operates the thumb lever. The thumb lever can still be used instead of the twist grip. Handy Throttle ATV Throttle Kit : Cabela’s
A disadvantage of this twist throttle is the grip foam looks real thin.

Another option is a throttle extender. This attaches to the throttle lever and makes it longer. It gives you much more leverage and it is a cheap option. ColemanĀ® Nonslip Thumb Assist Pro : Cabela’s

I road a motorcycle for several years so I am inclined to get a twist grip but the thumb extender looks like a good cheap simple option too.

Thanks for any comments.