The unknown brand Shenger offers quite a few products with overused designs, but surprisingly, those are not toys at all. The G400 actually sounds great for many kinds of electronic music. The bass is intense and deep, while the mids and highs are laid-back. True bass-head earphones, but you should consider amplifying them a bit, because they aren't so loud, and don't sound too good, on low-power sources.
As compared to G360, these sounds just about the same. Most likely, they both have exactly the same drivers. The only thing I noticed is the G400 having slightly less mid-bass bloat than G360.