I have owned all three types. I started out shooting as a junior wearing one of the cloth jackets. It provided good cushioning for my elbows but that was about it, I had that jacket for a couple of years.
Next I purchased one of the heavy leather jackets, it was a great improvement and not only providedthe cushioning for the elbows but now I had a tremendous amount of support offhand and kneeling that I never had before.
Now, after returning to the shooting sports after a many year layoff, I found my offhand is not what it used to be and that maybe I could benefit from one of the stiffer Monard Ultimate Highpower jackets. I ordered one of those and recently (a few week ago) took possession of it. I will have to put some time into working on a new offhand possition as when I put the rifle to my shoulder it just doesn't sit the same way and I have to either kink my neck or cant the rifle. Neither of which I want to do. I do like the jacket and feel that when I have things worked out, it will be a help to offset some of the skills I've lost.
After this match season I will be trading up from a non adjustable stock to one of the WOA adjustable match stocks and hopefully will find the answer to the way the rifle fits me there.
My leather jacket is over 35 years old and has seen a lot of heavy use. I feel you get what you pay for and if you buy quality right out of the gate, not only will you find the features are better but it should last you a very long time. It makes the sting of the price tag easier to swallow.
If this is for highpower shooting, I'm sure you could easily find another shooter close enough to your size that would let you try one out before you make any final decisions. I have let several people try out my gear, it's good for the sport and I like to see more people interested in it.