Java Generics - are these two method declarations equivalent?

Question

Given some class SomeBaseClass, are these two method declarations equivalent?

public <T extends SomeBaseClass> void myMethod(Class<T> clz)

and

public void myMethod(Class<? extends SomeBaseClass> clz)

Answer 1

For the caller: yes, they are equivalent.

For the code inside the method: no.

The difference is that within the code of the first example you can use the type T (for example to hold an object created by clz.newInstance()), while in the second you can't.