The problem with posting at 1am on a Friday after a few G&Ts, is that it never looks good in the morning.
I would agree with you to a large extent Westley. If your mount is good – counterclockwise rotation
into the shoulder - then a recoil pad within a vest can be quite helpful. My experience however is that many are used by shooters whose mounts slide the gun into place causing the pad & vest to drag and end up in a different position each time. Even a little slide creates a problem.
My daughter started at the age of 14 and we went though various options. For her it was bit of a Catch 22 – it was not until the
guns had a decent recoil pad fitted to them that her mount became consistent. Once her mount was consistent she may have been able to use one in her vest.
Going back to the original poster's question, my daughters vest was a Browning and I found the Browning version inflexible. I think it is really a slab of sorbothane. The Musto D30 system appears better – I also much prefer their vests which are good quality and have the additional 2 inch flap at the front for winter layers and extra roast dinner.
The pads on her guns were “kick Ezz” and now a “Green” – the latter is one of the adjustable ones – see
https://www.recoilsystems.com/. I can’t say there is much difference between the two.
One final point – A regular shooting friend had issues with a B25. We looked at the comb and cast and though about various temporary DIY options only to think a new stock was unavoidable. We are partially right, as the stock was swapped, but key was a new kick-ezz with a pitch towards the top of the comb (heel) – advised by a gunsmith and fitted with great success. The pad was contacting in the wrong place.