Need help to choose between a 4k (non-ultrawide) and a 1080P (ultrawide ~ 21:9) monitor for development.

Finally, this pandemic has convinced me to set up my home office. I am a developer and work with tools like IntelliJ, VSCode, terminals, browsers, etc.

What should I choose for a monitor? A 4k (non ultrawide) or a 1080P (ultrawide ~ 21:9 curved/noncurved). They both cost almost the same. A 4k Ultrawide is out of my budget.

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Thanks.