Jay I recently shot both the Shadow2 and the Sig 320 X5 back to back. In my hands I noticed a significant difference in muzzle rise between the two guns. The X5 for me, did not rise as much as the Shadow2. I should also add when I shoot, the guns I shoot all rise upward under recoil. Some guys I know can shoot and the gun never rises much.
We all know it is the archer not the arrow in any match but I was surprised how little the X5 rose when I shot the gun. I would guess the X5 is going to be a competitive option for most. The winners at the Worlds or at the top of any sport are sponsored shooters and I suspect guys like Vogel can win with about anything they have in their hands be it a Shadow2, Glock or Tanfanglio.
Both guns you ask about cost about the same. For the club shooter I believe it will come down to preference. If I just spent $1,500 on a Shadow2 I suspect I would be inclined to think it was the best option for me. So too, the shooter who dropped about the same amount on a Sig X5.
In the interest of objectivity I just bought an X5. Read into that what you may. The gun, to my surprise is very flat shooting.
Take Care
Bob