How does that equal B&M? I would think if anything Intamin would be the quality. B&M has more coasters but Intamin's coasters are more regarded as the elite in the world.
I have to disagree. Most of B&Ms coasters are quite consistent in quality - they may not all be amazing, but there are very few that are truly bad. Meanwhile, though Intamin has undoubtedly had some amazing rides, they've also had some really, really crap ones. For that, I have to say B&M have been very successful. Another bonus for B&M is that, out of their 90 coasters, none have been demolished - though Time Machine's fate hangs in the balance.
However, from an economic point of view, Vekoma have done extremely well. Over 280 coasters in countless countries all over the world. They've dominated the junior coaster market, and I'd say they're considered a top choice for looping coasters for a park on a smaller budget. They may not have the best reputation with enthusiasts, but they're definitely getting better. They seem to be doing extremely well.