I have used the Salomon XA Pros as my trail runners for about 15 years (bought the Comps once I think too) but also use heavier boots for periods of time as well for outdoor work. Would you consider yourself very agile in the trail runners? Can you dance on top of the rocks so to speak? I would guess yes if you actually run in them. If you don't regularly use beefier shoes/boots you may hurt yourself more trying to use them the same way. If you switch in and out of different types, you'll have more muscle memory. Heavier shoe and you will wear out a little faster too, particularly if not used regularly. Now if you just plow through the rocks you might want something sturdy.

Not really a perfect test lab, trails come in multiple flavors. Sometimes even there is no trail.