This also makes a big difference once we start talking about pointers to arrays.

    int a[] = {1, 2, 3}
    int (*p1)[3] = &a; // ok
    int (*p2)[3] = &a[0]; // not ok
    int *p3 = &a; // not ok

(It should be noted that these will compile with warnings in C due to implicit conversions via void*, but you're still risking UB if you actually use the resulting value. They are all errors in C++ because it doesn't have implicit conversion from void*.)