I use mine (Seneca) mostly (~60% of the time) for ripping narrow stock as I don't have a table saw due to space constraints. Setting the width of cut with a stop on a ruler is my preferred method and gives great results.
I had the RIP guides previously and they worked brilliantly. But they used Incra track sliding under the rail for narrow rips which meant the rail would be raised 18(?)mm off the table and that caused problems with thinner stock. The Seneca ones have a thin sliding piece that's only about 6mm thick and alleviates that problem. The TSO and possibly the WP ones have a thin bar and would work just as well I'm sure.
I'm not a fan of using a rail square (or 2) for narrow rips as they have to go on the ends of stock that may flex in the middle and, often times, you don't have much to register off when working with narrow materials. Having the guides movable on the rail accessory slot means you can position them to provide the best support as and where you want it.
Were money no object, I'd likely go for the TSO set with 2 rail adaptors. But the Seneca ones work well enough... at a fraction of the price.