PSG have a busier schedule than we do, if I recall correctly.
With regards to the La Liga matches, it shouldn't be a problem if we rotate. Busquets will be back and for the first time in ages we won't have a player injured at this crucial part of the season. I would expect Pique-Masch/Bartra-Mathieu duos rotating, Masche/Busquets at DM etc.
Only problem is MSN playing every match.
Once the international break stupidity ends, we play Celta Vigo away, while PSG will face Marseille away. In midweek, we will have to face Almeria at home while PSG will host St-Etienne for the League Cup, also at home. We then have to face Sevilla away, while PSG will host Metz. Then we will have to visit them in Paris, which means that they will have two consecutive home games, while we, two consecutive (and difficult) away games. Then, we will host Valencia (who are riding high, and have zero commitments outside of La Liga) while PSG will have to play away at Nice. We will then be hosting PSG at the Nou Camp. So, we are the one with two consecutive home games.
So, the number of games is equal, but I feel that our run of games is tougher than PSG's.
Another thing, PSG I feel, are relatively safe in the knowledge that their rivals (Lyon, Marseille and Monaco) will more than likely drop several points in the run-in. We have no such luxury versus Real Madrid, who conceivably may even make it ten out of ten in the title run-in.