Mortgage Loan analysis

[Mashy Green]

Dear BP community,

I have a very general but, i think, very fundamental question here.

If i am looking to build up my rental income portfolio, what is the best strategy for me when it comes to mortgages; should i put down less of a down-payment but pay a higher interest rates or put down a bigger down-payment and pay a lower interest rates? The difference in the interest rates is not more than 0.5% 

thank you all in advance