The decision of which framework to use ultimately comes down to the needs of the developer. Bootstrap is generally faster and more efficient than Vue.js, but it may not be as flexible or extendable. Vue.js is usually more flexible and extendable, but it may not be as fast or efficient as Bootstrap. In terms of ease of use, both Vue.js and Bootstrap are fairly easy to use, but Bootstrap is well-documented and therefore easier for developers to get started quickly.
In conclusion, there is no clear answer as to whether Vue.js is better than Bootstrap. Both of these frameworks have their advantages and disadvantages, and the best choice will depend on the needs of the developer. It is important to carefully weigh the pros and cons of each framework before deciding which one is the best choice for the project at hand.