Ok, I see it now. BTW, I think you nailed it as to why some HR215's have the shutoff version but others don't. It appears to be that Honda changed things, for whatever reason, on later models. Come to think of it, I haven't seen any engines (GCV160's &190's) with the shutoff in the last, say 10-15 years.
Usually the cut off is fitted to the commercial engines because they bounce around in their trailers and tend to flood during transist.
Also commercial operators are nowhere near as price sensitive as the domestic market.
Cut off valve with sediment filter is generally found on stationary engines because the sediment trap would not work with the mower bouncing around on a lawn.
There is no problem with Chinese made parts that have ben made in a quality controlled factory,
Honda has 11 factories in China, All of the Honda engine we get down here come from China , as does most of the small Briggs & Kohlers.
And yes the factories in China buy in carburettors from other factories in China.
The difference is what gets put into a bag with Honda on it has been quality controlled , inspected and passed.
The scrap that gets rejected ends up being sold on Ebay & Amazon.
Thus the bad carburettors with problems that were made by the factory that supplies carburettors to Honda end up being sold as OEM & fitting x,y & z.
All of which is true, what gets omitted from the description is the carburettor was one Honda rejected as being substandard .
Having said that some will be good, they are simply over production.
The problem is there is no way of telling till they get fitted and the engine still dose not work right , so the owner rips into the engine , oft doing more damage doing so thinking that it can not be the carb because it is brand new from an OEM supplier.
I see these all the time, they come through the gate, the owners having thrown a lot of money at them replacing all sorts of things when the problem is a faulty carb and the original problem was a dirty carb that was not cleaned properly which is a lot harder than many would expect, some taking several hours in the ultrasonic cleaner with very agressive cleaning solutions.
I am an independent service technician & fit CHINESE parts , however they are bought through real wholesalers who have a real warehouses, real reps and cover them with real warranties as they are quality controlled at the factory.
Now getting back to YOU.
You have a problem that you can not seem to identify or fix so you have decided to try to overcome it by fitting a new carburettor.
Nothing wrong with that approach.
However that will only work , if the new parts you are fitting are actually good & fit for purpose.
You have no way of assertaining if the carb is good or bad so in those situations it is prudent to get the carb from some one who stands behind what they are selling .
Amazon & ebay retailers do not do this in most cases they are nothing more than a person who imports parts, send them to an Amazon / ebay warehouse who store & dispatch them to you.