Sometimes it varies by something as small as when or what platform a show was released to.
Cheers seasons 9-11 on DVD have one of those ugly stupid "CBS/Paramount Television" logos plastered at the end. The streaming versions use the circa 2001 Mountain, itself a plaster but correct for the era...
I always figured it's because the people who put them together are extremely anal and count a slightly sped or distorted or faded version a "variant", even though it's just the same exact standard logo just from a faded film print or with distorted music because the film print is old or slightly...