What changes between the drive systems
A belt-drive opener moves its trolley with a reinforced belt; a chain-drive opener uses a metal chain. Chamberlain describes belt-drive products as a quieter option and chain-drive products as a budget-conscious choice. Compare the actual models, because drive type does not settle the included controls, backup capability or installation cost.
Start with what you notice every day
Consider bedrooms near the garage, how often the door is used and whether the current complaint is noise or unreliable control. Tell the installer which issue matters most. Selecting a drive label before discussing the door can leave the real concern unresolved.
Compare equivalent packages
Ask for the exact models being compared, including accessories and any backup capability. One package may include a keypad while another requires a separate purchase. Document what comes with each proposal so a price difference is not mistaken for a difference in motor quality alone.
Assess the existing door too
An opener choice should follow an assessment of the door it will operate. If the door has new grinding, uneven movement or visible damage, arrange service before treating a different drive as the cure. Keep the purchase discussion focused on equipment that suits the complete installation.
Your questions
Does a belt drive guarantee a silent garage?
No. The moving door, installation and surrounding structure also matter. Ask what the selected model changes and which existing noises need separate attention.
Can I choose based only on horsepower?
A single advertised rating is not a complete specification. Compare compatibility, accessories, intended use and the manufacturer’s requirements for the proposed operator.