Windows XP is technically Windows 5.0, Vista is 6.0, and 7 is 6.1.
The 7 in Windows 7 is just the name of it, since vista was 6.0 they named it 7 (at least I think that’s why it’s Win 7)
So in answer to your question, both Windows 7 and Windows 6.1 are the same product, it’s just 2 ways of referring to it.
| Operating system | Version number |
|---|---|
| Windows 10 | 10.0* |
| Windows Server 2016 | 10.0* |
| Windows 8.1 | 6.3* |
| Windows Server 2012 R2 | 6.3* |
| Windows 8 | 6.2 |
| Windows Server 2012 | 6.2 |
| Windows 7 | 6.1 |
| Windows Server 2008 R2 | 6.1 |
| Windows Server 2008 | 6.0 |
| Windows Vista | 6.0 |
| Windows Server 2003 R2 | 5.2 |
| Windows Server 2003 | 5.2 |
| Windows XP 64-Bit Edition | 5.2 |
| Windows XP | 5.1 |
| Windows 2000 | 5.0 |