Go ahead and bash it all you want, but you have virtually just restated what I have put in the post. If you're so fussed about the recoil variance, by looking at the gun stats in the weapon_hkp2000.txt file in the root directory (which contains both gun stats), they both have a recoil variance of 0, which is why I did not put the value in. That's why you can't use that value for anything.
Now I know that experience does speak, and again, it's all personal preference, but you're spreading misinformation yourself without any stats to back you up.
On a simple stand-still-and-fire-one-bullet basis, the P2000 is actually more accurate, albeit by only 4%.
The P2000 does not do less damage over range than the USP. If you take the basic damage stat (at an arms length), which is listed as 35 in the root files, and change the range to 1500 units, the damage stat for both the USP and the P2000 is 26.37, a rounded difference of 8.7. Again, this is the same for both guns, so the damage drop off does not affect any differences between the two.
What you said about close range is true. The guns are too similar for a clear difference to occur.
Yes, the P2000 has more spread and more recoil (but not more recoil variance, as it's the same value of 0), but this only comes into effect when multiple bullets are fired in quick succession. That's why I say that the USP has better spraying advantages than the P2000.
The USP does have more standing and moving inaccuracy, which does make the gun less accurate than the P2000. The spraying down thing will be true for both guns. However, if at a mid-to-long range, you're full-spraying and not tapping a pistol, there's something wrong with you.
Yes, more bullets is an advantage, although your second/third tap basis is somewhat unwarranted, since you later state that recoil won't play into it because it's based on quicker fire. On this point, you may just be lucky to always hit on the 2nd/3rd bullet, because if you're properly tapping, you're letting recoil reset, and thus it will not factor into your accuracy. So really, this point is unwarranted, as again, it's restating what I've said before about the P2000 being a better tapping pistol.
There is no extra damage on the USP, so that's more misinformation.
Finally, the silencer is the only thing you've stated which is better, because, again, the P2000 has a slightly better (4%) first-shot accuracy.

I'm not sure what you've achieved by this, but you've basically spread misinformation yourself. Please do some research to back yourself up befre you do this again.