are these powders worth it?

hi im thinking about getting the brown flower knows keychain but the powder is pink. wonder if theres any difference between the pink powder and the white powder (yellow keychain). and if theyre as good as the innisfree powder!!

i also found a few on taobao for half the price but im unsure if its authentic or will give the same results.

should i just buy it from their official site or has anyone any luck getting these instores?