Difference between `osrmRoute` and `osrmTrip`

[wcjochem]

What is the difference between osrmRoute and osrmTrip? The documentation states that osrmRoute is for distances between two points, but the loc option allows for multiple stops along a route (as given in its example). osrmTrip also accepts multiple points. These two functions give different results for the same sets of points, so when should each function be used? Please clarify the function documentation and consider adding an example to demonstrate how to select the function.