First off - you are buying from Fasttech, NOT Fasttech made e-liquids.
Then you have to take Everything into consideration:
Personal Taste - Taste is Very subjective
Manufacturer of Flavor - Dekang is Day and Night Different from Hangsen or Liqua
Dekang/Hangsen both Every early developers of Flavored E-liquids
Dekang - more to natural tasting flavors, some sweets
Hangsen - more to sweet taste, some naturals
Liqua - Italian style of lightly flavoring to accent, mellow but accurate(mostly)
Then you will get those that SWEAR Chinese e-liquids are garbage,poison,etc. simply because they are USA or DIE types.
Fact is everyone has to make their own personal choices in life to truly learn anything.