Thanks for your reply.
Re Lebermuth and AFI - specifically I'm hoping to purchase readymade oils (without a need to tweak).
The issue with samples is that it is very subjective for us to pick what is "best". So lets say we were to buy a "honey" fragrance oil. Both will supply this and if we got a sample I would expect both would be good.
Do they both have a great reputation (to the extent that if I were to buy 10-30 different oils at 25lbs+) blindly could I expect that the oils from both will be high quality. Are they both very well respected?