Neither of them are in the upper echelon of stuff Devin's done, in my opinion, though I did enjoy both of them. I think Epiclouder has more original ideas to offer and has stronger songwriting that doesn't depend on production sheen in the same way that the main disk does. A lot of the time when I'm listening to Epicloud it just makes me wish I was hearing Addicted or Deconstruction, because a lot of the ideas i hear on Epicloud feel like they were already explored and fleshed out more thoroughly on those two records.
For the most part, I've heard enough "over-the-top-crazy" stuff from Devin and it's starting to feel redundant. Most of the SYL catalogue, Infinity, Synchestra (to a lesser extent), Addicted, Decon and now Epicloud are all records that focus on big, loud, saturated, thick, as-much-sound-as-you-could-possibly-want-to-hear music. I think Deconstruction was really the logical apex of that element of his sound; he'd never done anything that technical and vast before and i have a feeling he won't again. At this point I'd love to see Devin explore more of the muted, grounded musical sentiments like he did on Ki, and Epiclouder invokes that kind of feeling in me in a way Epicloud doesn't (especially Quietus, Heatwave, Little Pig, and Love and Marriage). Even the heavier songs on the bonus disk are less reliant on sonically pummeling the listener.
Devin's best gift as a writer, if you ask me, is his ability to write memorable melodies. My favorite records that he's made, (Ocean Machine, Terria, and Ki) all seem to be crafted around the melodies in a way that lets and heaviness/loudness just fall into place as opposed to the reverse, which I feel is true of SYL/Decon/etc. I really enjoy most of Devin's work, but at this point in my life as a listener I'd much rather hear him dial back the gain and compression a little bit and make some music with a little room to breathe the way he did on Epiclouder.