A quote proposes work and price
Use a quote before the customer has approved the scope. It should make pricing, quantities, discounts, taxes and validity clear at a glance.
An invoice requests payment
An invoice should include payment details, due date and clear line totals. For official posted invoices, payment follow-up and tax reporting, use Odoo Accounting.
Keep company details reusable
Company name, logo, address, VAT and default currency should be stored once and reused across documents to reduce manual mistakes.