Complex sentence: As a final note, it is to be mentioned that the final version RD-275M is sometimes designated as RD-276 but for present 2009 year the name RD-275M (14D14M) is more common.
Split into simpler sentences: As a final note, it is to be mentioned that the final version RD-275M sometimes designated as RD-276. For present 2009 year, the name RD-275M (14D14M) is more common.