It may have been created by the same people, and have the same man leading it, but Facejacker is certainly no Fonejacker.
There's something about it that just isn't as funny: It's less random, and you don't get to see the reactions of the people he's mocking - like you hear in Fonejacker.
This show is more like Trigger Happy TV than Fonejacker, but it's not as amusing. Basically, it's just one man dressing up as someone else to make things awkard for others - and record their reponses.
There are some funny characters but the show needs tweaking. In the meantime I'm sticking with Fonejacker.