There is no clear answer as to which is better, LTI or LTTS. Both have their own advantages and disadvantages. Many factors must be considered when choosing between the two. These include the type of project, the timeline, the budget, the team's skills and experience, and the client's needs and preferences.
LTI has a few advantages over LTTS. One is that it is less expensive. LTI is also generally faster to implement than LTTS. Additionally, LTI is more flexible and can be customized more easily to meet the specific needs of a project.
However, LTTS has some advantages over LTI as well. One is that LTTS is more scalable. This means that it can be expanded more easily to accommodate a larger project. Additionally, LTTS is more reliable. This is because LTTS uses a more standardized approach and has more built-in quality controls.
Ultimately, the decision of which is better, LTI or LTTS, depends on the specific needs of the project.