I haven't tested Chimp but since it rely on Selenium I think you can have a look at articles that compares Selenium and Cypress. I do have tested Selenium (with nightwatchjs) and I really prefer the simplicity of setup and use of Cypress. Especially the fact that since Cypress runs into the browser (not remote controlling it like Selenium) it have a better understanding of events and all javascript stuff and you need way less hacks (wait till render complete, etc...).
It is also really easy (trivial) to debug your application while the tests are running since it is not running in a black box but in a browser right in front of you (just open the chrome dev tools and put some breakpoints).
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I haven't tested Chimp but since it rely on Selenium I think you can have a look at articles that compares Selenium and Cypress. I do have tested Selenium (with nightwatchjs) and I really prefer the simplicity of setup and use of Cypress. Especially the fact that since Cypress runs into the browser (not remote controlling it like Selenium) it have a better understanding of events and all javascript stuff and you need way less hacks (wait till render complete, etc...).
It is also really easy (trivial) to debug your application while the tests are running since it is not running in a black box but in a browser right in front of you (just open the chrome dev tools and put some breakpoints).