TLDR: Boss taking my sales to meet his quota. Do I speak up or keep my head down and work?

I'm working this commission based sales job part time. The dynamic of our suit store is in a way where everybody competes to sell. This means I have to work alongside my boss targeting the same customers.

Problem is my first week at the job I hit my top tier commission target and I don't think he was expecting that. Now he "takes over" the big sharks who come into buy. I wouldn't say I'm better than him at the job taking into account of his 2 year experience over me. But it gets annoying when I do the hard sell and he comes through and takes all of it for himself.

Knowing the first rule of power, I haven't shown any resentment. But I did lay a "thanks for coming in and closing that big sale, it was a great learning experience to see how you handled big money players". It was partly to show I noticed but at the same time to play dumb. Thought worst case scenario he'll think I'm autistic and go easier on me

At the end of the day its just a job I do to keep the bills paid while I get through college. But I know I have much more of the same treatment in store for me when I get into my real career.

Any advice on how you handled a similar situation and/or whether not trying to shine brighter than your superior has helped you in the long run.