VDI vs DaaS

Comparison chart paraphrased from following articles:
Five questions to ask as you compare VDI vs. DaaS
Compare desktop virtualization options: DaaS vs. VDI

~	Virtual desktop infrastructure (VDI)	Desktop as a Service (DaaS)
What it is	Virtual desktop infrastructure (VDI) virtualizes a host desktop operating system onto a central server that can display to a remote device. VDI allows users to access full desktop capabilities on thinner machines, as most of the processing and computing happens on the back end.	DaaS is similar to VDI, in that it also deploys an operating system from a hosted desktop to a remote device. DaaS differs from VDI because instead of hosting desktops in an on-premises data center, DaaS uses a cloud-based back end from a third-party provider. DaaS offers companies the opportunity to have VDI capabilities, while maintaining a subscription-based price.
When to use	When companies have a large employee base (this option is cost effective) When all of organization's data is on premises When security and control are important	When users are distributed far and wide - DaaS providers with multiple data centers allow users to connect to the cloud that's closest to their physical location. When the company is a a smaller business, or one testing out virtualization. DaaS does not require a huge cost investment at the start. If a company is not sure of the scale it desires, DaaS can adjust to fluctuation in virtual desktop numbers, where VDI would require reworking to do so. DaaS vendors handle connectivity and any issues, while IT can still maintain a role as the administrator over user accounts. If the main objective is to reduce upfront deployment and management costs, DaaS has the advantage because the cloud provider handles configuration and maintenance in exchange for subscription-based pricing When organization has lot of data in the cloud
Challenges	Requires a sturdy support system of IT professionals who are willing and able to develop and customize desktops, as well as maintain efficiency with deploying updates and managing data traffic. Network connectivity - Without a strong connection, VDI goes to a crawl, cutting into valuable work time.	IT must put full faith into the hands of the DaaS provider to maintain security. The cloud is a double-edged sword, though, because it can also provide a security vulnerability.
Examples	Citrix Cloud on Azure simplifies how customers deploy VDI, virtual apps, desktops, and complete Citrix workspaces on one or more Azure-based resource locations.	Amazon WorkSpaces is a fully managed, secure Desktop-as-a-Service (DaaS) solution which runs on AWS.