I think we are likely just talking about adjacent but distinctly different lending worlds.

The mortgage system is different between the US and Spain in that in the US the refinance mortgages are supported by institutional investors - the largest of them being the US government.

However a distinction will be in the details. 10k to go to wholesaler and 2k to your broker for your payout.Make sure your client is okay with that as it will be spelled out in the contract. 

There is a vast and distinct difference between the two. 

And as just one example: if certain trends continue, the US won't even be the largest economy in just 20 years (nor the leading economic power).

The core distinction between these two options, other than the interest rate, lies in the varying prepayment penalty scales: 4% more for the first year, 3% for the second, and so on.With the latter option, my cash flow is healthier in the present context.

The MD of the largest owner of SFR in the nation had a few things to say about the nearly $3.0b investment they deployed in the past couple of years.

I have been actively engaged (important distinction!) 

the largest development is A Pocono Country Place that has close to 4,000 homes.

I live close to Philly and I run the largest group of Philadelphia Landlords on FB  - Philadelphia Landlords Connect.