Unicode is better if you do not use Windows 98 or ME or not use!
Non-Unicode is for all Windows systems:
Win98, 2000-2016, XP, Vista, Windows 7 x86 and x64
Unicode is for all Windows NT systems:
Server 2000-2016, XP, Vista, Windows 7, 8.1 Windows 10 x86 and x64
FAQ 2: Updated on: February 26th 2017 15:15