In any company's line, the most proven and durable are usually at the B or C level, these are usually nearly as light as the A level, but often have a bit of extra beef, since they aren't as weight driven as the A line. They are also usually the best dollar values giving you something like 95% of the performance of the A line at 65 % of the cost.

Comparing equal level groups, it's hard to say that Sram is weaker, but there might be some of that in the A level - Red - road line, for instance in the FDs where many serious riders trade down to Force.

The truth of the matter is, that it's hard to wear out anybody's components these days, except for the lowest groups. But if your bikes see rough service, you might want to stay away from some of the carbon parts like brake levers, that often don't fare as well when abused.