Dear all, so many people have doubts regarding weight of belta vs vitz. So, kindly googled it and u will find that both of them have same weight and hence same weight to power ratio. Vitz have french design and belta is japanese design.
TOYOTA VITZ catalog - reviews, pics, specs and prices | Goo-net Exchange
TOYOTA BELTA catalog - reviews, pics, specs and prices | Goo-net Exchange
Also review their infos from wikipedia to counter check it.
Both have same engines types and weights, its up to you which design u like