I don't think either of them have been particularly good recently (except as you say Cristiano against Málaga where he was outstanding in my opinion, a nice complete performance). Both of them have been mainly about producing "moments" in the past month or so: Messi has still been decisive by scoring or assisting the opening goals in most of his games but overall he looks sluggish (a descriptor I've rightfully seen used a couple of times already on him in this thread) and the same can be said about Cristiano minus the sluggish part -- you could even argue that he only had about five moments against Granada and didn't even really need to do anything else in that game. In this period I'd say that Griezmann and even Neymar have been outperforming the both of them quite comfortably.
In Messi's case it goes even beyond that, in the sense that recently he's been playing more as a MF in certain parts of the games (2nd halves mostly), mainly keeping the passing rhythm going and helping with possession and controlling the game (which they struggled with greatly against Celta, Sevilla and Valencia). Individually you can see he's struggling with the physical component of his dribbling and it's just not coming off anymore with any great consistency since the knock he got v City. Tactically he's still immensely valuable in creating space for Neymar and Suárez just by his mere presence, but that alone won't keep cutting it in the upcoming games (Catalan derby this weekend, potential title decider at the Calderón on the penultimate matchday, CL SF and possible F, Copa América in the summer)...
