Two of the dominant methods to crimp PEX to fittings seem to be: 1) ASTM F 1807 and 2) ASTM F 2098. I guess, this is a picture of the two methods and this is a picture of the typical crimping tools used for the two methods.

Is there any indication as to which method results in the more DURABLE and more RELIABLE bond?

Aside from reliability and durability, seems to me that the Stainless Steel ring method (ASTM F 2098) uses a smaller tool to crimp the ring and thus seems easier to use in tight spaces (like crawlspaces).

IÂm also under the impression that it is OK (??) to mix tubing and rings from different brands, so long as both products specify that they conform to the same ASTM crimping standard. Is this correct?

Thanks