What is the difference drivers SafeNet Authentication Client and eToken PKI Client 5.1 SP1 for the protected media?

Actually,the question in the title -and Safenet and eToken PKI Client is written as follows:
Supported operating systems:

Windows 10 (32-bit, 64-bit),
Windows 8 (32-bit, 64-bit),
Windows 7 SP1 (32-bit, 64-bit),
Windows Vista SP2 (32-bit, 64-bit),
Windows Server 2012 RC1
Windows Server 2008 R2 SP1 (64-bit),
Windows Server 2008 SP2 (32-bit, 64-bit).
Compatible eToken:

eToken PRO (USB keys and smart cards);
eToken NG-OTP;
eToken NG-FLASH;
eToken PRO 72K (Java).

BUT, many say that Safenet need to put only the OS above windows 7. Why?
June 5th 19 at 21:27

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