Choosing between the two, Edelbrock of KRE.
The decision should be made on what you want for flow, charge velocity, chamber shape, intake, camshaft, etc. The two heads are not the same. When I bought mine the Edelbrocks had larger port volume than the KREs. I wanted a higher velocity flow as I was building a rather mild street/road car not a race car and was looking for good low RPM response so I went with the KREs and a rather mild camshaft. I wanted an engine that got most of the power at rather low RPM and mine straight lines at just over 5000 all the way to 6000+ but gives me over 600 lb/ft of torque under 4000 RPM and 400+ at 2000 RPM. Lots of low RPM grunt but the power levels off at just over 5000 RPM. If you're building an engine for max power at high RPM you need different heads, intake and camshaft than one built for low RPM torque.
My heads flow 310/239. If I was building a different engine with a larger cam and intake Dave would have ported the heads to a higher flow.
I don't think one head is any better than the other just saying choose a head and the machining to suite your needs.