Hexagon Boltswithsplitpin HoleonShank

I've used linear slide rails in the past, but not under this particular application. They are inexpensive, easy to find, and have high static load ratings, I am not sure how their static pitch moment compares w/ linear guide rails.

I am at the beginning of the design of a small platform that will move in X(1500mm) and Y(1000mm) axis. Motion will be provided by belt driven linear actuators (1 per axis). I would like to add linear rails to platforms outer edge(s) to provide rigidity and reduce roll moments on the linear actuator stages.

Splitpin HoleBolt

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On the other hand I could use a linear guide rails. They have high static loads, moment load and pitch moment load capabilities. I have not used them extensively. They do seem to be the more popular choice in design of automated systems.

Given I am most concerned with the longevity, rigidity, and precision of the system, what are some Pro's and Con's of the Linear Guides vs the Linear Slide Rails?