Using ARs for MVC vs. using Move to Primary or other instruction?

[Tony Thigpen]

All,

I have used ARs to get data from other VSE partitions (address spaces to 
you z/OS guys). I am looking at a program that needs to 'snap shot' a 
partition by copying a lot of data, then printing it.

I have never used "move to primary" or "move with key" type instructions.

Is there any performance, or other reason, I should look at these other 
instructions? Or, should I just continue to use ARs?

Tony Thigpen