Cost and maintenance
Vinyl is usually the more budget-friendly choice and does not need paint. Fiber cement usually costs more, but it gives a firmer painted-wood look.
Durability
Fiber cement is heavier and more rigid. Vinyl is easier to maintain, but it can crack from impact or move with heat if it is not installed correctly.
Which one should you choose?
If you want practical maintenance and a lower price, vinyl is often the first option to compare. If you want a stronger finish and like the painted look, fiber cement may be worth the extra cost.