The Wrights and Pratts an turn faster than stock, and that helps power in addition to more MAP.
From what I know, the Centaurus runs very well and very reliably at stock RPM levels but, if you run it much faster, even as little as 2,900 rpm, it gets very delicate in the sleeve valve area. It'll stand more MAP, but has trouble running even just a little bit faster than stock rpm.
That said, unless you are a serious racer, there is no reason to run one at higher than stock rpm as they are very powerful in stock form. So, a stock-looking warbird with a Centaurus can be a LOT lighter than wartime weight, and a stock Centaurus gives it very good power to weight. The main knock against the Centaurus is that it is getting hard to find good parts. I only know of one shop that can hone worn-out Centaurus cylinders back to smooth bores, and that is Joe Yancey's shop in Chino. There may be others but, if so, not many.
He did the cylinders for Ellsworth Getchell and the barrels for two Queen's flight Centaurus engines. Most shops don't seem to know how to get the top-of-the-stroke step out of the worn cylinders. Joe has it figured out. The Centaurus seems to run quite well and reliably. I hope to hear them still running for many more years. Great engine.