I've been messing about with short pips lately in an attempt to create a more all-around defensive game. And while I've made some good progress in learning to chop with short pips, I've found that against very spinny and fast loops I still have a little work to do
One trick I've learned to get around this problem is to play a nice sidespin fish that is deep and fairly high to the backhand instead of trying to chop the ultra spinny loops. Basically, it's the same shot the pros use on their forehand when they can't chop a loop with the inverted side 
Anyway, After testing out various short pips such as: 802, 802-40, Spectol, Pluto, and 799-1, I eventually narrowed it down to Pluto versus 799-1.
I tested the Pluto in 1.3mm on a Matsushita Pro Blade, and the 799-1 in 0.6mm on the Joo Se Hyuk blade...
1) Pushing: The control and consistency felt about the same between the two rubbers, the main difference was that Pluto had more spin reversal and tended to pop-up a little, and the 799-1 was easier to keep lower and could create more spin.
2) Attacking underspin: The 799-1 felt much better in this area. The Pluto could create effective attacks, but felt rather slow and dead. The 799-1 on the other hand felt much more solid and inspired more confidence when hittting. It's ability to create spin kept the attacks low and fast.
3) Countering Topspin: This category again goes to the 799-1. I found it ridiculously easy to hit against topspin with great control. The thin sponge allowed me to really feel the ball. In contrast, the Pluto took a little more adjusting because of the deadish feel, but because of the slight spin reversal, the balls were a little more difficult to deal with.
3) Blocking: Both of these rubbers are great for blocking. The Pluto created slow, dead balls that made for a nice change of pace, and the 799-1 sacrifices that spin-reversal in place of speed and accuracy. The Pluto needs a definite forward movement with blocks, and the 799-1 you have to angle the paddle down more to compensate for spin.
4) Chopping: Pluto wins hands-down in this area. Control was great due to the dead sponge and low sensitivity to spin. I was able to out-chop my partners loops for the first time since switching to short pips. The 799-1 was also good for chopping, just not quite as effective as Pluto was. One thing that 799-1 was good for was to crank up the spin when chopping drives and flat hits. The control in chopping for these two pips is definitely higher than the other short pips I've tried, but against spinnier loops the sensitivity to spin that 799-1 has becomes more noticeable.
These are both great pips; unfortunately, both are on the list to be banned next year
go figure...
If I had to choose I'd go with 799-1 because of it's more all-around abilities and its over-all feel. My next test is to try the Pluto on the same 0.6mm sponge and put it on the Joo to see it that helps the feel when attacking without sacrificing to much of its chopping ability.
The spin reversal on chops and chop blocks was also a little better due to the thinner sponge and the harder blade!