Should I get two identical monitors?

Yes. Matched monitors ensure consistent brightness, color temperature, and pixel density so your eyes do not have to adjust when moving between screens.

Is 4K overkill for coding?

No. At 27 inches, 4K provides 163 PPI which renders small fonts crisply. This reduces eye strain during long sessions compared to 1080p or 1440p at the same size.

Best Dual Monitor Setup for Software