Short Answer
They differ in material composition, appearance, maintenance, weight, installation, impact characteristics, moisture management, cost, and warranty. There is no universally correct choice.
Detailed Explanation
Vinyl siding is made from PVC plastic. It's lightweight, relatively inexpensive, low-maintenance, and available in many colors. It can crack on impact and may fade over time in dark colors. Fiber-cement siding is made from a mixture of cement, sand, and cellulose fibers. It's heavier, more durable, fire-resistant, and can mimic the appearance of wood siding or stucco. It requires painting (typically every 10-15 years) and is more expensive to install. Vinyl is the more common choice for budget-conscious homeowners; fiber-cement is preferred for those seeking premium appearance and maximum durability. Both can perform well when properly installed.
Why It Matters
Understanding the trade-offs between vinyl and fiber-cement siding helps homeowners choose the material that best fits their budget, maintenance preferences, and aesthetic goals.