Ugh, I wrote out a whole reply but it lost it. OK, here goes again.
Trigger point work is a completely different philosophy than Myofascial work. TPT works deep into the trigger points located within a muscle, that is causing loss of function and/or referral pain, locating trigger points and treating them using deep specific pressure. Myofascial work effects muscle through the most superficial fascial layers. Have you read Anatomy trains? This is a great reference for the idea of fascial connections. Myofascial work can be very slow, sometimes as much as 10-15 minutes per glide to get a release, using little or no lubricant and as a result it can feel very frictiony to clients who are used to non-therapeutic modalities. It is also extremely effective (so is TPT but in different ways!). It works with principals of fascial unwinding, superficial to deep, etc.
The Barnes stuff in general has a huge following. As my old teacher put it, it's a bit of a 'cult' but not in such a bad way. Just that you either are a huge fan of his or not at all. There are others out there doing myofascial work I just think that Barnes is one of the biggest names. He is also somewhat of a character (watch his videos on his website, they will give you an idea of what I mean). From what I know, his certifications are fairly large class sizes, so not sure if that is a positive or negative to you. I was thinking of taking his coursework at some point but probably not for a while yet as I have some other things that I wanted to take care of first.
I also wanted to add that I don't hold 'certification' in either trigger point or myofascial work, but my training included the basics of both of them so I have some familiarity with them and thats why I thought I'd respond. Hope this helps.