Saloon or tourer? The 2.2 Saloon is CN1 the 2.2 tourer is the CN2. If yours is a saloon, it's a CN1, so the springs listed as CN1 will the ones you want. Many brands sell the same springs for all three engine models of saloons. The tourers differ in that the rear springs have a different load rating. But again, the petrol and diesel tourers tend to run the same lowering spring across the engine range. I think the weight difference in the engine block isn't that significant. Obviously, the diesel is a little heavier, but well within limits, hence most spring companies sell the same springs for all three engine models of the 7th gen Accord.
Hope that helps buddy.