looks ok for space. both might go over the ram slots but they have plenty clearance to go over the top.
i have a tuniq tower which looks a lot like the AC one you linked to, very effective and very quiet. the downside it that it needs a backplate to secure it inplace, so it's not just clip on like some others, and hence just needs a few minutes to fit it. sounds like the asus is easier to fit, but tbh for the amount of times you would have to refit it (none?) then it's hardly worh worrying about.
i'd go with the AC one as it's a 120mm fan rather than the 92mm one in the asus. it's either gonna be cooler or quieter or both
