az doug, I was tracking on what you said originally and in the linked post. The purpose behind my post was that, the spring setup makes more sense in a piston platform, at least to me. Now if LWRC made a DI gun I can see where it would be reasonable to run a bolt with rings for ease of production such as the bolt on Colt's 6940P.
To the OPs original question, no I don't think it makes a difference. Just different ways of accomplishing the same task.

