Identical Mix (Apples to Apples)
The first and most important rule: you can't compare interest rates if the tracks are different. If Bank A offers you 50% in a prime track and Bank B offers only 33%, the interest rates will be completely different because the risk is different. To truly compare, you need to approach banks with a *uniform* mortgage mix that you've built in advance (preferably with an advisor) and request a quote on *exactly the same mix*.

