The fact that there is the wording: "two variations" and the fact that the legal disclaimer also states that the higher output is linked to specific trims make me believe this is two separate engine.
Now is there hardware change or can the higher output potential be unlocked through a tune or software change? That will be interesting to see.
To further hint at different engine, the low output inline 6 seems to be exactly the same as the australian inline 6 on the CX-60 (same power and torque number). In Australia that is also the engine used on their cheapest trims. (PHEV being the most expensive for them. They also have the same PHEV power engine (range may be different though if the CX-90 battery is bigger). But they don't have the high output engine. So it looks like the only new engine for North-America is the high output engine.
low output inline 6: Australia and North-America
PHEV: Europe, Australia and North-America
High output inline 6: North America only.
Now is there hardware change or can the higher output potential be unlocked through a tune or software change? That will be interesting to see.
To further hint at different engine, the low output inline 6 seems to be exactly the same as the australian inline 6 on the CX-60 (same power and torque number). In Australia that is also the engine used on their cheapest trims. (PHEV being the most expensive for them. They also have the same PHEV power engine (range may be different though if the CX-90 battery is bigger). But they don't have the high output engine. So it looks like the only new engine for North-America is the high output engine.
low output inline 6: Australia and North-America
PHEV: Europe, Australia and North-America
High output inline 6: North America only.