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In principle, the topic is very well formulated: it's about what you PREFER to play. In this sense, it's about PERSONAL PREFERENCES, not the objective advantages/disadvantages of units and castles in general.
In this sense, regarding Inferno, I can say the following: considering the abilities of upgraded imps, pit lords, sultan-efreets, the retaliatory strike of cerberuses and devils/archdevils, as well as the lightning bolt of magogs, the castle is quite strong, at least in terms of gameplay.
However, personally, when Inferno appears in a random map, I'm not too happy: I personally prefer others.