How do I compare quotes?
Each company may have a different method of drafting their quote and parsing them can be tricky. Remember to compare apples-to-apples, not apples-to-oranges. Discern any similarities and differences in the scope of work, materials, payment conditions, contract type, and WSIB compliance of tradespeople.
Also important are intangible traits based on your dealings with each company. How attentive and punctual have they been? Have they demonstrated the willingness to provide guidance or solutions to your concerns? If a candidate cannot demonstrate these qualities while they're biding for your project consider if they'll demonstrate them once they have it, because accepting a project should come with the realization that unexpected issues will occur.
Ultimately you should choose someone you're comfortable with.