The difference between commit and asynchronous commit functions

(1)
().submit({
url:"......",
params:{ XX:xx .....}
success: function (c,v,e) { //e: Trigger event
var json=();
},
failure:function(c,v,e){}
})

(2)
({
url:"....",
params:{XX:xx....},
success: function (v,c) {
var json=();
},
failure:function(v,c){}
})