Should I finish my undergrad in 3 years (this year) or 4 years? Which option is better for graduate school application?
There is no benefit to graduating in less time except getting a year ahead. No one will be impressed by a 3 year graduation.
It's more important that you show proficiency in courses related to your intended area of study, and obtain research experience.
If someone's option was to graduate a year early or do a research project, I think the answer is obvious: stay and research. You have some research experience already, so your decision seems mostly between applying right away for grad school or gathering more experience for awhile and then graduating. The choice is entirely yours, there is no &quot;best&quot; answer.