When comparing GNU grep vs TextCrawler, the Slant community recommends GNU grep for most people. In the question“What are the best grep implementations for Windows?” GNU grep is ranked 6th while TextCrawler is ranked 7th. The most important reason people chose GNU grep is:
Since it's pretty much the same grep used on UNIX systems, people who have used grep on any *NIX system will find themselves at home with the Windows version.
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Pros
Pro Great for people used to *NIX systems
Since it's pretty much the same grep used on UNIX systems, people who have used grep on any *NIX system will find themselves at home with the Windows version.
Pro It handles files of any size
At least in Linux.
Cons
Con Cannot handle files
When searching through files with 10MB or more it starts having issues and even crashes depending on the file size and the machine it's running on.