The one I linked to is the NSN/part number called out by the A1R/A1P2 parts manual as fitting trucks with serial numbers above 100,623
The older valve is part number QS5-5CTP or NSN 4810-01-442-8695
The older trucks used two intake "atomizers" while the C7 trucks use one. They are not the same NSN as the double atomizer setup.
It is worth noting that between serial numbers 100,001 and 100,623 it appears that the older system was used on the A1R/C7. Just to completely confuse the situation.
The TM also notes that QS5-5CTP as being used on serial numbers 18,549 and "prior" and there's no clear indication of what was used between 18,550, and 100,622 although I think that's probably just a parts manual glitch and all those trucks are likely using the QS5......