I thought it was RCS's. Paint theme threw it off. It's Steve Vander Vorste's (SJ Entertainment). I was never impressed my Maus coasters. They're all pretty similar but that's my opinion.
There's many reasons why so many more companies are going with the Zamperla models. Overall purchase price, insurance, maintenance, cost of parts, availability of parts, how many trucks does it takes, all those sort of things. It's kinda like the old debate of what's better to own. A Mack Himalaya or a Wisdom Himalaya. Some companies prefer the smaller version because it's cost effective (single trailer), over the Mack version (typically four trailers), and it can bring in the same amount of money as it's bigger cousin.