With sounds it is always difficult to say which are better. Usually some are better in one scenario and others are better in different scenario. It is not just about exterior/interor but also exterior from front/back/side and interior it depends if you are in the cockpit, in the front of the engines in the cabin, over wing, behind wing, at the end of the cabin etc. Also sounds are different if you have headphones as pilot. Some things you cant hear with headphones ON or with engines/recirculation fans running. But to make all these things it would make the sound packs more expensive. In ideal world we should have sounds in the cockpit with headphones ON/OFF options and in the cabin. The interior engine sound sounds differently for pilot, for pilot with headphones and for pax in front of the engines, over wing and behind engines...that is difficult to script. We are in flight simulator so my opinion the interior sound should sound as pilots hear them from cockpit with heapdhones off/on (that would need some cabin switch connected to this action). Many players claim sounds are not realistic and they never were in the 737 cockpit and their sound experience is only from the cabin...