which is better?? w660i or k618i??

haiyoh.. sis.. wat type of phone u wan me buy le?? wan me help u save money a?? i really think until head also big.. should i come out wif extra amount to buy better de phone?? should i use 3G?? o should i just buy odinary de?? around RM500 can liao le?? with no specific function on it?? haiyoh.. i really dunno.. who can gv me some advise??

all i know is that i wan sony ericsson de phone.. erm, better to hav mp3 in it lo.. i am thinking if i really wan the 3G the function ma?? i did hav fren that hav it and i did hav experience in using that la.. so now dunno if i wanna buy a phone wif 3G function ma?? n if can of course i wish to hav camera in it la.. if can la.. 2 megapixel would b fine i guess.. i just miss my old phone so so much..

below is 2 phone that recently i pick.. one is k618i and another is w660i.. k618i cost about RM700++ and w660i cost roughly about RM900++.. there's about RM200 de diff.. but the function for both phone is about the same.. just that w660i come along wif 512mb de memory stick.. then, the k618i just wif 16mb only.. then w660i got fm where the other dun hav.. i prefer w660i actually.. i didn know which worth to buy and i am pretty headache.. o anyone have better suggestion?? WAT GOOD PHONE U GUYS CAN RECOMMEND??

~Sony ericsson k618i~

~sony ericsson w660i~