Dedicated hosting services primarily differ from managed hosting services in that managed hosting services usually offer more support and other services. As such, managed hosting is targeted towards clients with less technical knowledge, whereas dedicated hosting services, or unmanaged hosting services, are suitable for web development and system administrator professionals.
Ample RAM (5GB or more), e-commerce options for selling products, 24/7 customer service, and unlimited monthly data transfers are highly sought-after features, too. Many web hosts cap their dedicated monthly data transfer offerings at 16GB, which is probably fine for most users. Some web hosts offer unlimited monthly data transfers, but they are few and far between, and you need to read the terms of service very carefully to understand just what "unlimited" means to the host in question. In addition, companies that offer dedicated web hosting typically offer daily backups, security options, and malware detection and removal—all very important factors in your website's day-to-day operation.
Bandwidth consumption over the last several years has shifted from a per megabit usage model to a per gigabyte usage model. Bandwidth was traditionally measured in line speed access that included the ability to purchase needed megabits at a given monthly cost. As the shared hosting model developed, the trend towards gigabyte or total bytes transferred, replaced the megabit line speed model so dedicated server providers started offering per gigabyte.
Yes. If you currently have a VPS hosting account with us, you can upgrade to our dedicated hosting at any time by ordering a new server. For fully managed customers, we will migrate your data from your current account to your new server. You can also upgrade either your VPS or your dedicated server with Premium DNS, which improves both your security and performance. 
×