kia engine swap???

The engine in my 94 miata is blown, but i found the same mazda bpze engine in a Kia Sephia. Im thinking about buying the Kia engine. Is there any hp or performace diffrence between the miata engine and the sephia engine? And if so can i just bolt all my external parts ( like intake, exhuast...etc) on the engine to aquire the same hp as the miata engine?