Anyone else prefer ergo but play better on ambi?

I recently bought a rog keris wired and I really like the shape of it feels great in my hand but for someone reason I just play worse in every shooter compared to my superlight.

I'm very sure its not placebo because I only noticed after 2 months of using my keris without giving any attention to my mouse that I started playing worse compared to my superlight. Anyone else feel this way?

On another note, anyone know any good chinese viper v3 clones? I used to use a viper ultimate a few years ago and I really liked it but I dont want to drop 200 cad on a v3 pro