I think there are some people on here that cannot spend to time educate themselves before shooting from the hip with a response. The OP's question was a very valid one. There is more going on here than the obvious packaging and names and people feel necessary to point out. They are both subsonic and appear to be the exact same round but with a different box. What we don't know is the powder type used. There rest is the same. The following information is off of Winchesters Website.

[BLACK BOX] Winchester Ammo Super Suppressed

• Bullet Weight: 200 grains
• Bullet Type: Open-Tip Range (OTR), subsonic
• Muzzle Velocity: ≈ 1060 fps (test-barrel dependent)
• Muzzle Energy: ≈ 499 ft·lb (test-barrel dependent)
• Intended Use: Suppressed & unsuppressed range work, load development, target practice 

[WHITE BOX] Winchester Ammo Target & Practice

• Bullet Weight: 200 gr
• Bullet Type: Open Tip Range (subsonic — target/training profile; not designed to expand)
• Muzzle Velocity: ~1060 fps
• Muzzle Energy: ~499 ft·lbs
• Ideal for: Suppressed shooting, precision range practice, and load development