Il faut faire de l'exercice tous les jours.
Il faut qu'on fasse de l'exercise tous les jours.
Are the two sentences completely equivalent? Is it just that the second is more formal than the first one, or is there some subtler difference in meaning? This post seems to suggest the former, but it is just with one example and one answerer.
Also, is it the same with "Il est nécessaire/préférable/important/..."?