The Leadr (spelling things wrong is the hype in 2017 I suppose) looks interesting. However I remain sceptical whether it's better than my trustworthy Logitech G602, and if it can beat its 70 euro price-tag.

The leadr is exactly the same as the Tyon except it's wireless and a new sensor. As a previous exclusive Logitech user, it feels almost exactly the same as the G series nice. All those extra buttons don't get in the way and they are easy to reach. It's a fantastic mouse

Roccat always adds a whole new layer to marketing jibberish, but at least their mice tend to be quite good. They had one of the best 3090 sensor versions (Savu) and according to some people 3310 as well. Odds are the 3361 (modded 3360) will be solid too.

The leadr is exactly the same as the Tyon except it's wireless and a new sensor.

seems like a significant difference...