Which course is better for reducing handicap?

[clubchamp98]

My current HI is 5.0

Course A
A score of 81 would give me a 6.2

Course B
A score of 78 would give me a 6.1

Either of these would give me cut.
I would be inclined to go for Course A to give me the best chance.

Without further info or experience of these two notional courses, I fall back on my experience of my own course which is
Par 70 either tee
White 70.8/132
Yellow 69.1/127

I believe white tees at my club give me the better chance of desirable score differentials.
Yellow tees are "harder" for me.
It niggles me a bit at my club when we have a seniors comp, they put us on the yellow tees, which I find harder. But very few, if any, think like me it seems.

In a real world case, each player will vary from the "standard" by which courses are rated. A personal choice has to be made with regard to one's own strengths and weaknesses.

I do !
Off yellows all the bunkers are reachable for me.
Off whites there not.
There’s not much difference between the tees but I lose two shots off the yellows.

As to the op it depends on the shape of the holes as well.!
Anyone who plays a draw will struggle on a predominantly left to right course and vice versa.
We all have certain courses we just don’t play well.