Removal method should follow the actual ceiling
Some popcorn texture releases relatively cleanly when properly prepared; other surfaces have been painted, repaired or coated enough times that scraping becomes slow and damaging. In those cases, a contractor may propose skim coating, covering or a hybrid approach. Ask for the reasoning rather than assuming one method is universally better.
Where the ceiling material is old or unknown, discuss appropriate testing before disturbance. A specialist should be able to separate ordinary cosmetic removal from work that requires regulated handling.
Get the post-removal finish into the written scope
Los Angeles bids can look similar at first while covering very different endpoints. Confirm whether drywall damage, tape repairs, skim coats, sanding, primer and final ceiling paint are included. If the contractor prices painting separately, request that number up front.
Also ask how the crew protects HVAC openings, floors, built-ins and adjacent rooms. Popcorn removal is messy work; containment and cleanup are part of the service, not an afterthought.