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Hello Nick, Is the 917 better than the 918 in terms of sweet spot size and any other measures? Also, why was it discontinued? -Oscar Cha
No, they are the same with different paint jobs and a different rubber connection piece. 917 means 2017, 918 means 2018 model. The 917 is no longer made because it was for 2017. Now that it is 2018, the 918 is out.