SUBSPLEASE:
-- uses crunchyroll streaming source with minimal mod other than subtitle font
-- crunchyroll errors kept
-- torrents and xdcc downloads
-- usually just x264
-- usually has absolute episode numbering
ERAI:
-- crunchyroll stream sourcing
-- releases multi-language subs as available
-- provides correction updates such as _v1 and _v2
-- torrents and DDL (direct downloads)
-- has both x264 and HEVC (x265) releases
-- uses season/episode number eg S01E01
RECOMMENDATION:
If you want a re-encoded smaller file version (x265) of SubsPlease releases, get the ones from ASW as those are basically automated re-encodes.
https://www.youtube.com/watch?v=YSmBtdvinO4 
