The main difference between distillate and concentrate is that distillate is a purer form of cannabis extract. This means that it contains higher levels of THC, CBD, and other cannabinoids. Concentrates, on the other hand, are not as refined and may contain impurities such as plant matter (like terpenes) or waxes which allows you to have a more flavourful experience.
Distillates are made by using a process called chromatography which separates the different compounds in cannabis. The end result a highly concentrated form of THC that can be up to 99% pure.