Edelbrock RPM vs. E street vs. Stealth?

I used the E Steet heads earlier this year with a Voodoo hydraulic roller cam, no issues at all. The E Streets I used had the 84cc chambers and looked exactly like the RPM heads. I do believe that the Stealth heads use Comp springs/locks/retainers now, so at least they fixed that problem.

Link to build: http://www.forabodiesonly.com/mopar/showthread.php?t=181273