Fixed the thread title for you
I haven't followed either promotion for a decade or more. I will say this, though. When I was following TNA in the mid-late 2000s, it aired on UK cable TV. On the Bravo channel if I recall. I have no idea how long that lasted for, but I seriously doubt ROH ever appeared on our cable TV. Could be wrong though.
Perhaps ROH's problem is a lack of marketing and promotion. TNA attracted a lot of the biggest names in the industry. Sting. Kurt Angle. Jeff Hardy. Kevin Nash. Eric Bischoff. Ric Flair. Hulk Hogan. That's why they became popular. What is the biggest star ROH had as a regular roster member? I have no idea. Matt Hardy? In TNA's early days, they were a bit bush league even though they had some pretty big names. But after a few years in the game, they became something more. They improved their production, came across as a legitimate competitor to WWE, got some attention, and hired those big names. I've not seen any ROH after their TV deal. What do their shows look like? Do they still have an "indy promotion" vibe? There must be a reason they can't attract the stars like TNA once did. Unfortunately cooperating with NJPW isn't doing them any favours in that respect either. As good as it is, Japanese wrestling is very niche outside of Japan.
For a long time ROH has been the premier US independent promotion, attracting the cream of the crop, but nothing more than that. They are fodder for the WWEs and the TNAs and the NJPWs. TNA started out that way, but they quickly rose above. I put it down to marketing.