grunt vs gulp

Gruntfile.js

module.exports = function(grunt) {
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    concat: {
      options: {
        separator: ';'
      },
      dist: {
        src: ['src/**/*.js'],
        dest: 'dist/<%= pkg.name %>.js'
      }
    },
    uglify: {
      dist: {
        files: {
          'dist/<%= pkg.name %>.min.js': ['<%= concat.dist.dest %>']
        }
      }
    },
    jshint: {
      files: ['gruntfile.js', 'src/**/*.js', 'test/**/*.js']
    },
    watch: {
      files: ['<%= jshint.files =>'],
      tasks: ['jshint', 'concat', 'uglify']
    }
  });

  // Load Our Plugins
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-watch');

  // Register Default Task
  grunt.registerTask('default', ['jshint', 'concat', 'uglify']);

};

gulpfile.js

var gulp = require('gulp');
var jshint = require('gulp-jshint');
var concat = require('gulp-concat');
var rename = require('gulp-rename');
var uglify = require('gulp-uglify');

// Lint JS
gulp.task('lint', function() {
  gulp.src('./src/*.js')
    .pipe(jshint())
    .pipe(jshint.reporter('default'));
});

// Concat & Minify JS
gulp.task('minify', function(){
    gulp.src('./src/*.js')
        .pipe(concat('all.js'))
        .pipe(gulp.dest('./dist'))
        .pipe(rename('all.min.js'))
        .pipe(uglify())
        .pipe(gulp.dest('./dist'));
});

// Default
gulp.task('default', function(){
  gulp.run('lint', 'minify');

  // Watch JS Files
  gulp.watch("./src/*.js", function(event){
    gulp.run('lint', 'minify');
  });
});