Gzip is the more reliable because it is deflate plus a few headers and a check sum. In other words gzip is deflate, and extra headers and check sum. Deflate is checked with adler32, which is also part of gzip. Because the gzip payload is a DEFLATE-compressed payload.
Deflate info
Gzip info
a gzip file/stream contains:
- a 10-byte header, containing a magic number, a version number and a time stamp - optional extra headers, such as the original file name, - a body, containing a DEFLATE-compressed payload - an 8-byte footer, containing a CRC-32 checksum and the length of the original uncompressed data