char랑 signed char는 다른건가요?

#include <iostream>
#include <type_traits>
 
int main()
{
    std::cout<<std::boolalpha;
 
    std::cout<<std::is_same<int,signed int>::value<<std::endl;
    std::cout<<std::is_same<char,signed char>::value<<std::endl;
 
    return 0;
}