Hi Pspa123,
When it comes to pillows there really isn’t any way to compare them outside of your preferences for the type of material (such as 100% natural Talalay vs blended Talalay vs 100% natural Dunlop etc) but the feel of the pillow depends on so many factors (including the particle sizes and shapes and the amount of fill) that your personal sleeping experience or conversations with the retailer or manufacturer is really the only way to get some sense of how they might “feel” for you compared to others. There are too many variables and preferences to use specs when it comes to the “feel” of pillows.
I think though that if you are looking at shredded latex pillows that you haven’t tried in person then the ability to adjust the amount of the fill such as here or here or here would be a very useful option so you can customize it in terms of thickness and firmness.
You’ve probably already seen this but just in case the pillow thread here may also be helpful.
Phoenix