I tested the Beeman Chief and found that it's very comparable to the Benjamin Maximus in most respects.
The Chief has a better trigger, easier pellet loading and, personally, I prefer the wood and metal build. The Disco we tested was somewhat more accurate, however. We also need to remember that the Chief is a pre-production sample and some things will change before the first production guns become available in a few months time.
Here's the Chief review:
And this was our take on the Maximus:
Archer Airguns Inc.