Should i prefer using inline static member variables?

Question

i have a lot of classes with static member variables without inline, and now i am refactoring them. Are inline static member variables slower than their counterparts? (i read that inlined METHODS are bad for performance, is it same with VARIABLES)

Which one i should prefer:

with inline:

class AClass
{
public:
    //standart data types
    static inline int LastStaticIndex = 0;
    static inline bool Log_AllEnabled = false;

    //a struct (in microsoft case "CRITICAL_SECTION")
    static inline Mutex mutex;

    //a struct with member with dynamic size
    static inline std::string Text = "testing";
};

without inline:

class AClass
{
public:
    //standart data types
    static int LastStaticIndex;
    static bool Log_AllEnabled;

    //a struct (in microsoft case "CRITICAL_SECTION")
    static Mutex mutex;

    //a struct with member with dynamic size
    static std::string Text;
};

//cpp file, (or even same header file)
int AClass::LastStaticIndex = 0;
bool AClass::Log_AllEnabled = false;

Mutex AClass::mutex = Mutex();

std::string AClass::Text = "testing";