The only faction that matter is Crimson Legion and Cerulean, these are the two faction that dictate what clan you can join. So a Crimson can only join a Crimson clan and Cerulean can only join a Cerulean clan. These two faction are also important in endgame farming as well.

For others like blackram you just get a uniform that you can wear, wearing it will makes you hostile to Bamboo guards or other players wearing Bamboo uniform. It doesn't affect your character in any other way.

My whole clan have move from BnS NA to BnS TW, a few poster in the thread have also stop playing.

For anyone in SEA region definitely less lag, it's 50-60 ping compare to 200-250 ping with VPN

Better event, BnS TW always have some sort of events going on and giving out free stuff. Currently they are giving out free 1x100k exp charms daily and 2x 1 million exp charm weekly. Previously they give out costume for sharing a post in FB.

Better premium which does not have ranking, you get remote storage as soon as you buy it. Different package gives you different items, for example 90 days package give you 4000 hm coins, costume, trade pouches, etc. Premium also get 300 hm coins for login and another 300 hm coins for 5 hours ingame. Only thing it doesn't have is upgrade discount which is sold separately in the HM store

Wardrobe is free for all.

Daily dash items better than what NA gives it's players.

NO unnecessary buffing of mobs/bosses like NA did

More contents to do since BnS TW is a few patches ahead from NA

Ingame voice chat, but this is only good if you know mandarin, some players are willing to use it to teach you new dungeons or give instruction in raid

Bots will always be there considering it's a f2p game, but in TW bots doesn't join dungeon and afk, the most they do is farm openworld mobs which can be annoying when doing quests, though once you pass moonwater you will only see them doing some dungeons daily by themselves. Arena doesn't seems to have bots only afk-er from time to time.

Prices of things are different than in NA, stingers are cheap at 40-50s each, moonstone about the same price, transformation stone cheaper for those below silverfrost.

Leveling is much easier as survey provide most of the needed stuff like multiple brilliant keys, some weapon boxes, transformation stone, etc

TLDR; BnS TW is better than BnS NA in every way, whatever NA is doing pales in comparison to what TW is doing

Yeah there is head over here or here for EN patch

Majority of EN players are in this server 萬夫莫敵 and in Crimson

I would suggest you just try it out and see how you feel about playing in TW. That's what me and my clan mates did, we try it before we make the final decision to move over.

Don't bother with NA server, the lowest ping you can get is 250+ and though it's playable but as harder content starts to comes out it becomes less and less enjoyable to play at that kind of ping.