Yes, the holes are the same size, just fewer of them. I agree with you, I think it may be for a speed limiting governor set up, where the engine doesn't idle. I am just curious at this point. I got the correct one, and I'll be sending the other one back. Like I mentioned, I made a note in my parts book as to which one is which, but couldn't figure out why you would want to limit the fuel to the idle valve. I was hoping you would answer, and it sounds like we are on the same page. Thanks Don!