Depends what you looking for. Im  just shifted to TW for like.. 3days? I must say the ping is absolutely worth it. Did you play 380ms at NA? Absolutely come TW with 150-180ms.
To desscribe how much diff, my tw char(HM6 with main story gear only) did same dps as my NA char (hm10 with baleful10/dragon bracelet 4/and quite few upgrade. On top of it, i could evade most atks.
Just did mushin tower 15F literally deathless with TW char while NA char was still dying few times to get it done.

**Both char are same class & build, Blade Dancer**

But be warned alot of things are different, including ways to obtain gears and availability.

PS: not 180ms, its 108ms