Stiffness vs. Comfort has always been the biggest challenge in the gun belt world. The perfect belt for some, will always be either too stiff or too soft for others. A great gun belt should be constructed with the user's needs in mind. If the belt is too soft for your style of carry and firearm size, it is a waste of your hard-earned money. Conversely, If your belt is too stiff, you'll be reluctant to wear it due to discomfort.
In order to find a truly "great gun belt", you must consider your style of carry, your firearm size, your holster type (single mount/double mount), your waist size (longer belts need more support), and even your pants style (many dress pants will not accommodate 1 1/2" wide belts).
My advice is that you choose a belt maker with the ability to custom tailor a belt to your specific needs, and stands behind their products with a refund/replacement guarantee.