Ported Edelbrock versus W2 out of the box !

Rather than typing out a loooong response.......

What Is The Ideal Quench Height? - Hot Rod Magazine

Quench vs Squish:

Quench

The short version:

Proper quench creates turbulence in the combustion chamber, theoretically pushing the mixture toward the spark plug and reducing the possibility of unburned gases at the completion of the combustion cycle, which can play a significant role in reducing detonation and even exhaust emissions.

As I mentioned earlier, it can be done with open chamber heads, I’ve done it myself several times.
It’s just easier ....... and generally less expensive to achieve ..... with closed chamber heads.