That is true for the 11-14 trucks, the 15+ already have the same cams. Here is the response my tuner gave when asked about the swap:
The firing order is not different on 15+ Mustangs, unless you're referring to the GT350. In that case, yes the firing order is different. If anyone can show me data otherwise, I would definitely like to see it.
15+ Mustangs have 13 mm lift cams in both the intake and exhaust, but retain the same amount of duration as the 11-14 cams. The 15* intake cams are essentially 11-14 Boss cams, and the exhaust cam is what Ford had originally designed for the Boss, but instead they went with a 12 mm lift cam. To my knowledge, no one has confirmed specs on 15+ F150 cams, but rumors are that they are the same as the Mustang. This theory makes sense seeing the 15+ trucks continue to make power well into the 7K RPM range.
The intake cam phasers are different on the 15+ cars and trucks, and they use a mid-lock design to improve cam position during cranking, improved cold start emissions, and idle quality. However they still have the same 50* of cam rotation.
The 15+ intake cam phasers are not compatible with the 11-14 PCM, as I've found this out first hand as I've been tuning a 2014 F150 with a 2015 Mustang GT engine swap, and we've discovered this problem. Currently we are swapping the 11-14 intake cams and phasers, along with the lower crank gear, and should be able to tune this just like an 11-14 engine, but with the improved heads, and better rotating assembly.
Clear as mud...