The 9.3 is nice and that is what I wanted when I was building a stillhunting rifle.
I got the 338-06 instead.
The bullet selection is so much greater in .338 compared to 9.3.
That is a point for the 338-06. Bullets are available from 160 to 300 grains in .338 with several of each brand at 250gr or larger.
Most bullets in 9.3 are 286gr. The euros have a couple lighter and a couple heavier but mostly 286gr.
These two cartridges are so similar that it really comes down to what you'd rather have stamped on your barrel.