Define the project before comparing totals

Opening schedule
Count, location, measured size, operation, and grouping for every unit.
Product configuration
Manufacturer and line, frame, finish, glass, grids, hardware, screen, and ratings.
Installation method
What remains, what is removed, how the opening is flashed and sealed, and which finishes are restored.
Existing conditions
Known damage, investigation limits, allowances, and the change-order process for concealed work.
Access and logistics
Stories, equipment, landscaping, interior protection, staging, delivery, and site restrictions.
Closeout
Disposal, cleanup, operation checks, documentation, warranty records, and unresolved-item process.

A lower total can reflect a narrower scope rather than the same work at a better value. Normalize the assumptions first, then compare price, schedule, responsibilities, and exclusions.