Question about SUI API Use and Comparison


I am relatively new to front-end frameworks and had a quick question. I have used SUI to play around with a few projects and really like it compared to bootstrap, foundation, etc. I have started playing with Vue.js and it has been pretty easy to grasp and seems pretty powerful. However, I noticed that SUI has an API that looks very easy to use. Is that API intended to be a scaled down implementation of something like Vue or other frameworks? Thoughts on using SUI for a medium scale single page application with a Laravel API backend using SUI API. Or, is it still better to use something like Vue in conjunction with SUI for the styling and elements?