We assume that PDF creation with Adobe Acrobat using MS Powerpoint is faster on Core 2 Quad because of its larger L2 cache. A 12MB L2 totals more than 8MB of L3 and 1MB of L2 cache combined.
WinRAR is thread-optimized and memory sensitive, and it runs best on the technically most sophisticated platform.
WinZip is similar to WinRAR but uses a different compression format and operates without thread optimization. Therefore these results more or less reflect the processor’s single-core performance.