Bucksboy: the article you refer to in RISC User was in issue 10:1, November 1996, and was written by Stephen Streater, no less (founder of Eidos). I was very pleased with it at the time. The fastest Pentium tested was 200MHz, and the fastest PowerPC 120MHz. In the default Dhrystone tests the StrongARM beat everything else by a large margin. The 200MHz Pentium Pro did get the best score for the optimised test, but that was probably a compiler issue.
As for current Apples, the best one at present is a dual-processor machine with 2x 2GHz PowerPC G5s. Apple reckons it's the world's fastest desktop computer. PC makers understandably dispute this, but it should be noted that Apple's tests were done with compilers producing 32-bit code on a pre-release OS: i.e. the results may have been somewhat better if they produced optimised 64-bit code for use on the fully 64-bit-optimised release of Mac OS 10.3, which wasn't out at the time. Either way, it's a very fast machine, and runs both 32- and 64-bit code natively with no performance penalty for the 32-bit code. Anyway, it's as fast as, or up to 20% faster than, the fastest PC available at present, depending on which tests you read.