VDI or Virtual Desktop Infrastructure is a technology in which a virtualized desktop environment is created on the office or remote servers. In HVD, virtual desktops are created by cloud providers on their servers.
In VDI, you and your IT team handle infrastructure, including its security and scalability, whereas, in HVD, providers take up all the IT like installation, up-gradation, hardware or software glitches, and more.
You need a high initial investment to set up servers and infra in VDI. However, with HVD, you can work on a subscription basis as providers offer a pay-as-you-go model.