What do Whole Foods Market Inc. (NASDAQ: WFMI) and Sirius Satellite Radio Inc. (NASDAQ: SIRI) have in common? What do Wild Oats Markets Inc. (NASDAQ: OATS), Borders Group Inc. (NYSE: BGP) and Google Inc. (NASDAQ: GOOG) have in common? I'll give you a hint -- they all want to merge with some other company in their field. But the mergers are all very different.

Give me a break, one cannot compare the proposed merger between Whole Foods and Wild Oats to that of Sirius and XM Satellite Holdings Inc. (NASDAQ: XMSR). I know many Sirius and XM investors will lash out at me for this, but come on people! Sarah Gilbert made a very good case yesterday why the merger of the trendy food stores doesn't have antitrust issues: "There is a plentiful supply of organic and natural produce and other products available at both small local cooperatives and farmer's markets and large supermarket chains," least of all Wal-Mart Stores Inc. (NYSE: WMT).

Sirius and XM? Now that's a different story altogether. They are the only two satellite radio companies. There are no smaller competitors, or large competitors with a small market share. That's all there is -- Sirius and XM. Sure, the argument that the market includes iPods, internet and HD radios is very creative and may even work, but let's call it what it is -- a desperate attempt by the two companies to get their merger approved. They've even hired a lobbying firm.