Difference between yellow and red lightsaber Hi everyone,

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May i know if there is a difference between a yellow and red lightsaber? I once had an orange grade yellow lightsaber with 3500 damage. I dealt 8.5m on world boss.

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I now changed to a red grade red lightsaber with 6000 damage and i dealt 9.5m on world boss. The improvement was quite disappointing. So i was wonder if the colour of the lightsaber had anything to do with how it works?