Canvas LTI integration blocks some of the Canvas feature set and introduces its own assignment page interface, which looks different from a standard Canvas assignment.
Student Precheck option is available only in Canvas LTI. Using this option, you can provide students with a limited number of attempts to check their submissions for plagiarism before making the final submission.
Learn more about Student Precheck here.
Canvas Plagiarism Framework integration complements Canvas feature set with a plagiarism checking function. All the usual features and workflows, such as group submissions, peer review, rubrics, annotations, etc., are available in Canvas assignments with Unicheck enabled.