Which one is more important "Loan margin or Interest rate"?

When you buying your property, which one you are looking at, the total loan margin or interest rate?
It still depends, no definite answer.
Let me refine the question as below:
If you are investor,which one you are looking at, the total loan margin or interest rate?

Clearer question now? And should have better answer?
Let us do a math before answering it.

Compare the scenario below for a property price of $500K and loan up to 25 years.

Which Bank you will take?

Let me extend the table to few more scenario for your future perusal as below.

Normally at the initial stage, we try to get the lowest interest rate as possible.
This will help in term of cash flow. However, as u acquire more,u will find that bank will reluctant to give you higher loan margin.
At this stage,any bank can give you loan with higher margin even slightly higher 1% interest rate, I will take also.

Compare the scenario below for a property price of 500K and loan up to 25 years.

So for me, the loan margin is the concern and not so much on the interest rate.

My reason behind this is, the price increase higher than the interest rate given.
The property price increase 20% in 3 years compare 3% higher in the total interest rate charge to you.
I believe you know how to do the math.