What is difference between template and template . For me both are generating the same result

There is no difference. typename and class are interchangeable in the declaration of a type template parameter.

You do, however, have to use class (and not typename) when declaring a template template parameter:

template <template <typename> class    T> class C { }; // valid!
template <template <typename> typename T> class C { }; // invalid!  o noez!