Yes, technically, you can. Though one of the biggest advantages of If-So is that you don’t have to duplicate pages. Instead, you can split-test only a specific piece of content on the same page.
Nevertheless, if you want to split-test a whole page, you can do so using a simple JavaScript redirect code that can be pasted inside an If-So trigger. We already have the redirect code ready for you. You can learn more and find it here.