Difference between Enum and Define Statements

enum {BUFFER = 1234};

#define BUFFER 1234

enum ERROR_TYPES
{
   REGULAR_ERR =1,
   OK =0
}

// Yeah, dumb example
enum OpenType {
    OpenExisting,
    OpenOrCreate,
    Truncate
};

void OpenFile(const char* filename, OpenType openType, int bufferSize);

enum {
  ONE = 1,
  TWO,
  THREE,
  FOUR
};

#define ONE 1
#define TWO 2
#define THREE 3
#define FOUR 4

enum {
    STATE_ONE,
    STATE_TWO,
    STATE_THREE
};

...

switch (state) {
case STATE_ONE:
    handle_state_one();
    break;
case STATE_TWO:
    handle_state_two();
    break;
};

enum fruits{ apple=1234, orange=12345};

#define apple 1234
#define orange 12345

enum action { DO_JUMP, DO_TURNL, DO_TURNR, DO_STOP };
//...
void do_action( enum action anAction, info_t x );

void do_action(int anAction, info_t x);