Just a thought, but given that Topaz has managed a suite of over 20 plug-ins for a while, and given that the CC model for Adobe has resulted in a round robin for multiple products of "how do I get this XYZ to work with the new version of Ps CC?" it makes some sense to have a single interface with the Adobe products with each filter still working within it than it is to have to manage potential issues with each of them individually.
I've used a couple Topaz products in the past and had been tempted to get Texture Effects for a while as I've been delving into more of that style (i.e. "fine art") of post processing. A friend I've been tutoring on Ps wanted to do something similar so I decided to take a hard look at Texture Effects since they offer a 30 day trial. This is when I learned about the whole Studio thing. It's free so I said I decided what the heck, let's take a look, and I was surprised at what is offered for free in the package, including a large number of textured effects. Without paying for the "Pro" version they offer limited to no editing parameters other than blend mode and opacity, but if you use one filter at a time it's possible to tweak them in Ps. Again, you can download a 30 day free trial of the Pro filters so you can see what you're going to get.
For giggles I went thru the 21 available "Pro" filters and asked myself how many of them offer me something that I can't do in Photoshop, and given that they are offering a lifetime update of all of them as a package for just over $200 I wanted to see if those that would be worth buying, when purchased individually, would be worth forking up the price for all of them. Truth be told only a couple of these are unique to Topaz (Abstraction, Glow, Impression) with the rest either being restatements of other Ps functions or some simplification of a process that can be accomplished equally well in Ps if you know your layering tools and blend modes. I already own Impression and Glow, and will likely purchase Texture Effects only because it simplifies the application of textures with previews instead of having to do some guesswork regarding what might work with a given image.
I'm a dyed in the wool Ps guy and look at these other things for only what they'll give me that I don't have. Topaz, to me, is a tool that allows folks who aren't quite sure what they want to do with an image the opportunity to run thru a ton of preset previews that might inspire some level of additional creativity. I'm not that guy but there are times when I'm just not sure where to go with something and that's where Topaz has occasionally helped me. What I like about them is that they have the lifetime free update deal, and any filters that you've purchased already are free upgrades into Studio. The question is will Topaz one day go the direction of Nik where they're purchased and the upgrade model disappears as another company decides to redesign it and resell it?
