Question about ASUS Mx34vq

Since you used the PG348Q for comparison, I am convinced that the MX34VQ would be sufficient. I use this monitor for work (macOS) and for gaming (Win10), and with its 100 Hz it's perfectly suited for that, especially since the PG348Q isn't any faster.

I use the monitor mainly in the office, for office, graphics work (Photoshop, etc.).
But I have played Minecraft and Forza Horizon 4 on it, and it seems to me to be a good gaming monitor, but there are certainly better ones.