Also the Fire was called the Kindle Fire, even though it's just a sort of crippled mid range general purpose Android tablet with a Kindle reader app locked in and not at all related to previous Kindles or eink devices or ereaders in general.
Microsoft Surface? One version runs real windows programs, if you add a keyboard and mouse, the other version is basically an ARM tablet with the windows phone OS.
Windows CE, Windows 95/98/Millennium, three different Windows Phone OSes, NT family (NT 3.1, 3.5, 3.51, 4.0, 2000, XP, 7, 8, 10). Really only share the word Windows!
64 bit NT 4.0 was only for Alpha
1st XP 64 bit only for a Itanium, later completely different XP 64 was for x86-64.
So nothing extraordinary about Razr. They could even have called it the StarTac
https://en.wikipedia.org/wiki/Motorola_StarTAC
Which does seem to have been inspired by ST-TOS.
Apple OS X = OS10 was completely unrelated to OS9 and earlier. Then they stopped incrementing the major number on major releases, which should have been 11, 12 etc.