I think you're right although it's looking like it's a rev delimit more than anything else plus some balance changes, that video seems to point out the illuminated scuff panels which are an option maybe there are a few spec tweaks. If anything I think they may drop in a cx30 turbo at some point but it may hurt their skyactiv-x sales if they did that. Suppose Mazda have to balance the power of na engines (which I love the delivery of) Vs the market 'norm' delivery of smaller engined turbos that most manufacturers are going. On the balancing side of that is the current and oncoming emissions regulations and taxation which can really hurt pricing and/or tax levels. I do know that 150 is the one being recommended by quite a few review sites I've noticed in the past week.