Some of the chemical companies out there want to make it appear to be rocket science to get good results. The reality is that regardless of the delivery system, the chemistry behind it is not all that complicated. Some companies use more sophisticated blends and surfactants and their own delivery or blending system but the bottom line is getting good results from whatever you choose to use. What often increases product costs are fragrances and dyes. Costs of fragrances and dyes can vary widely depending on their quality and the amount used in the formulation.
If you are getting the results you want your next concern should be use cost over drum cost. While some products appear to be less expensive, their use cost can be more than products that cost more per gallon. You should learn how costs are calculated to make sure you are achieving the costs you have been told you are. There are simple methods that can give you general information all the way to actually doing a step by step process to get a more exact figure. While generally the "set it and forget it" rule is acceptable, it is wise to observe results daily to make sure that your delivery system is working properly.