The stuff you buy is either produced using HVAC or HVDC and it's my opinion that neither is similar to the LVDC predominantly ionic silver solution as per home produced relative to end product in its content overall.
The bought stuff may contain higher particle content, and any TEM image I have seen are not convincing as per entire volume produced, they only show a fraction of the volume on a glass slide and may not necessarily be representative of particle size and dispersion throughout the entire batch.
Home produced stuff will sill contain particles. It's also my opinion that both products offer efficacy in their own right, relative to the circumstance for which either is used.
Keep in mind that ALL marketers are vying for your dollar!! Those who state much techno babble and appear to know everything there is to know about EIS/CS will tend to draw the most customers. One has nothing to fear from the home made product, it simply does not stay in the body long enough to accumulate.