Which field is better among architecture and engineering?

Both the fields are totally different. It depends on your interest. If you are interested in planning and designing then you can go for architecture if not prefer engineering.

I think both of the streams have many opportunities. If you really love planning and organizing things then you may go with architecture. Also, if you are good with your basics then you may opt for engineering as this can be a good option if you work hard. But, pursue it from some good college.