Comparing cloud providers is complicated. With constant price drops and the frequent introduction of new instance types, no matter what answer you come up with today it is sure to change in three months. Taking into account differences in performance, it gets even more confusing when you realize that applications run differently on different clouds.
One thing is certain though: price in a vacuum doesn’t tell you the whole story. In fact, it’s a lot like selecting a car based on sticker price and assuming the fuel efficiency of the cylinders is equal across manufacturers. It’s not.