Racer esc for VTOL, it´s a crazy idea?

I have to change esc to my VTOL proyect for unsync issues so I have to buy new ones, racer esc looks smaller and lightweight than common ones but I don´t have electronic knowledge to know why we use the bigger ones in bigger proyects; flying time perhaps? as VTOL fly few minutes in quad mode it´s possible to use them? any 30A esc recomendation for sunnysky motors? Thank´s