We never use cold rolled steel because it rusts.
Galvanized steel costs us more but but the difference is clear.
The pictures below show the difference between using galvanized and cold rolled steel. Even if the products are coated, cold rolled steel will still rust when exposed to the elements.
Why then do competitors boast about using cold rolled steel in their products? For the same reason they tell you that reinforcing your jamb is the same as reinforcing your door. They have no clue because they never tested their products.
The photos below show a side by side comparison in the difference between cold rolled and galvanized steel. These results are over a 30 day period. How does this look over months or years?