All other things being equal, aluminum will last longer. Irrigation
pipe is made of a typical aluminum alloy, sees very harsh conditions,
and usually lasts longer than its owner.

Then there's the issue of thickness and cross-section size. See if
you can get to an actual installation and have a strong person really
manhandle it.

Occasionally you hear corrosion rumors about aluminum in conctact with
certain types of concrete, but if the aluminum is coated, I doubt that
will be an issue.