I don't really see the upgrade personally. Yes, they are made of a nice strong alloy compared to a spicer cold forged 760x, but they still use a roller bearing, and unless you clearance your axleshaft yokes for full circle C clips I believe you still have a weak point in the bearings and C clip retention, regardless of the alloy used.
They aren't much more than the spicers so you can try them, but they are no where near worth comparing to a CTM, longfield or Yukon joint.
Ah, I see, thanks. I saw the start of that thread but as soon as I saw
longfield I thought Toyota and didnt read it. It really should be retitled
aftermarket D44 ujoints for future searches or a new thread or sticky
should be started with a searchable title on this topic with links to all the
aftermarket hardened ujoints for the D44.