240 D24 Radiator

[DieselScout]

The original Volvo radiator in my '82 240 broke last Autumn.
Finally, I've had the opportunity to take it to a repair shop.
They said the radiator is a 28 tube dual layer, for a total of 56 tubes.

The repair shop said I can fix it and keep the 56 tubes (double layer) or upgrade to 78 (double layer), 80 (double layer) or 105 tubes (triple Layer)

Any thoughts on whether a 105 tube triple layer will cool significantly better than 78 or 80 tube dual layer?

The current radiator in my car (The spare radiator I used as the replacement) is a Nissens (product number 250278, I think...it's hard to read this number on the radiator) with 51 tubes, by my count.
I cannot tell if it is single or double layer, does anyone know how to verify this?

With the original Volvo radiator (56 tubes) my water temperature was sitting about 3/4 up on the gauge. With the replacement radiator, it sits just above halfway.