...I'm pretty sure it's the same thing.
FYI: Mine would get worse the more I drove it. Dealer said because the exhaust was heating up and expanding causing it to bump up against the truck. So if you take it in make sure to tell them they have to drive it for more than 10 miles otherwise they could miss it, they did that with mine the first time and thought I was crazy
, then they finally heard and was like "ok we need to fix that!" LOL.
Still took them a while to find it. So if you want have them call Joe who is the head service guy over at Koons in Tysons VA, it will save them a lot time and you can get your truck back faster.
Hope this helps!