Reportedly, the S4 and S4 Mini Black Editions are “the latest in Samsung’s effort to build on its commitment to deliver innovative technologies with more premium design choices to consumers.” Unlike the original Galaxy S4 and S4 Mini, the refreshed models come with faux-leather back covers - similar to what we’re seeing on the Galaxy Note 3 and Note 3 Neo. Even more, the new handsets feature a suite of “eight dedicated wallpapers”, exclusive ringtones, and black accessories - all in black packaging. That aside, they shouldn't differ, feature-wise, from the regular versions that were introduced last year.
Samsung didn’t specifically say which markets (besides Russia) would get the Black Edition S4 and S4 Mini. However, with the new Samsung Galaxy S5 expected to be announced at MWC later this month, these all-black S4 variants might go unnoticed