Node.js 0.8: trying to see a difference between child_process "exit" and "close" events

child_exit_close_test.js

function parent() {
  var n = 0;
  var spawn = require('child_process').spawn;

  var child = spawn(process.execPath, [module.filename, true]);

  child.stdout.on('data', function(buf) {
    n += String(buf).length;
  });

  child.on('exit', function() {
    console.log('exit', n);
  });

  child.on('close', function() {
    console.log('close', n);
  });
}

function child() {
  var n = 0
  var id = setInterval(function() {
    if (++n > 1000) {
      clearInterval(id);
    } else {
      process.stdout.write(Array(100001).join(1234567890));
    }
  }, 1);
}

if (process.argv[2]) {
  child();
} else {
  parent();
}

Can't get it to be different. Meh.