As above the grinder wins hands down every time regardless of chain, but on a side note the Pragmasis Round-lock could not be cut or opened even by the grinder due to the fact the lock is free-spinning and is not a solid lock as such which is a good thing as the grinder can not cut it at one single point without it spinning, I have one and have said from day one this little lock was the best thing I had seen.
Also looking at the sledge hammer attacks the pragmasis chain links held out much longer than the Almax chain links infact the 19mm Pragmasis chain link would not break full stop and they gave up in the end, some of the times on the Almax chain attacks looked average at best.