I’ve always used Oregon chain, but you have to realize that how the customer uses their equipment Will determine how long it lasts.
1. Keeping out of dirt and sand.
2. Keep it sharp.
3. Using the right bar oil.
4. Keeping the right tension on the chain.
5. Clutch maintenance.
These all will determine how long the chain will last.
Up until a few years ago all the chain in the US was Oregon. Even the saw companies that said they make their own chain. But if they were making their own chain they were paying copyright royalties to Oregon for like 4 patents.