Microsoft Project offers Free Trial, but Duet does not.
Duet is designed for Individuals, Medium Business and Small Business.
Microsoft Project is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Duet Starts at $59 whereas for Microsoft Project Starts at $10/User/Month.
Some top alternatives to Duet includes Quickbase , Smartsheet, ClickUp, Wrike, Teamwork, ActiveCollab, ProjectManager.com, Microsoft Project, OpenProject, Projectworks, Quick Base, Project.co, Projectsly by 500apps, MaestroCR and Project Insight.
Some top alternatives to Microsoft Project includes Quickbase , Smartsheet, ClickUp, Freshbooks, Jira, Basecamp, Microsoft PPM, Trello, Wrike, Zoho Projects, monday.com, Asana, ProjectManager.com, Worksuite, Projectworks, RationalPlan, Quick Base, Resource Guru and Resource Management by Smartsheet.