SharePoint + Power BI best integration

The 2 latest options to integrate PowerBI into a SharePoint page are as follows:

a) Power BI Rest APIs - https://powerbi.microsoft.com/en-us/documentation/powerbi-developer-integrate-report/

b) SharePoint Add-ins - http://rolandoldengarm.com/index.php/2016/05/11/part-2-embed-a-power-bi-report-in-a-sharepoint-site/

Are there any significant advantage/disadvantages of chosing one over the other?

Thanks in advance!