The difference between the two is that Gzip uses CRC32 while Deflate uses Adler32, which is slightly more performant. The problem, though, is that many browser

The difference between the two is that Gzip uses CRC32 while Deflate uses Adler32, which is slightly more performant. The problem, though, is that many browsers and servers (incorrectly) send or expect deflate without the headers, so "deflate" interoperability is a trainwreck.