Basement insulation question

Hi, I have received a quote for upgrading insulation in my home (I am a limited DIY-er and this is not something I plan to do myself)

House is 19 yrs old, 2 story brick structure approx. 3100 sq ft, unfinished basement near Toronto, ON

We have no plans to finish the basement in the next 4-5 years. There is currently yellow batt insulation framed in halfway down the walls.

The contractor is recommending that we insulate only the basement "headers" (his terminology) with 2 component spray foam insulation. He will then cover the foam with R12 fibre glass batts and install vapour barriers onto the headers.

To clarify, this is the area at the very top of the basement walls, in between each joist supporting my main floor, all the way around the full perimeter of the basement

He says this will make far more difference then finishing the insulation down the other half of the walls.

Can I please get some additional opinions on this?

Thanks in advance,
Peeth.