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The reason why I would choose Joget is that I could save costs and do the app myself, as I am more like a technical business guy instead of a real programmer. But, there are also many reasons why I would choose Vaadin over Joget; for example, we can use Vaadin 7 as a portlet in Liferay, which means integration with Liferay would be more addcanced advanced than with Joget (or at least that's how I understood after my research). Also, the Joget-Liferay SSO plugin does support only Joget v3.x instead of the latest version of Joget.
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