Dedicated Labs give you access to the entire pool of HTB machines, which are more than 160 today. Apart from the latest 20 machines, that are "Active", we provide full write ups for all retired machines. What's more, if you opt in for the Advanced plan of Dedicated Labs, you also get access to exclusive machines, where only the admin have access to writeups.
Professional Labs customers get full write ups of any ProLabs scenario they want to play. Those write ups are ONLY available to Professional Labs admins and are not published the general public of HTB