Sativas are generally more energizing and indicas are generally more soporific but the thing is it's really up to the cannabinoid content of the particular variety you are smoking as well as interactions with the other terpenes in said variety, and my understanding as a general layman in an illegal state is that a lot of varieties which are currently produced are hybridized either way so you're not really getting pure "indica" or "sativa" either way. And it's still a generalization that is open to more confusion when how the weed is processed matters, when it's harvested matters, etc., because time, heat, and other environmental factors will affect the conversion of thc/other cannabinoids into various metabolites which will contribute to the ultimate "high" that you get from it.