The verdict
If your pain is the silence after a proposal goes out, I'd pick Better Proposals. The nudging, the read tracking and the onboarding forms are built for that loop.
If your reps build many proposals from CRM data and you want them to start from approved content and pricing, I'd pick Qwilr, particularly on HubSpot, Zoho or Pipedrive, which work from its first plan. There is no single winner here. Both gate things behind plans. Better Proposals keeps CRM integrations off the entry plan, while Qwilr's Growth and Scale plans are annual with minimum seats. Build one real proposal in each and see which your buyers find easier to read.