They're certainly similar, but I'm not sure if they're 100% the same, either, and was unable to get through to my usual sources at Winchester this week to find out.
Suggest you go to Caliber Corner and give a shout-out to GT member Hotpig, who sells Winchester ammo and is extremely knowledgeable about the product line.
I checked with Hotpig. He says PDX1 series use the same bullet as the Ranger Bonded, except in 9mm. The Ranger Bonded loads in 9mm still use an older style bullet but they may be switching over to the newer style bullet soon in their 124+p load.