Continue to use Logitech G402 or upgrade to Zowie S2?

I have had the Logitech g402 for almost a year and am really happy with it, never a problem and everything works perfectly. Now I have 60 euro left after Christmas and have asked myself whether I can get a Zowie S2. Is there a difference in the sensor? I mainly play CS and Fortnite. Is it worth upgrading? Please leave the weight outside, that doesn't matter so don't include it. Only the sensor! No shape etc. I've already tested both so just include the sensor!

I didn't notice any difference from the sensor in the two like most mice.