Whips are the only things that hold their own against picks. They're basically supersonic micro-hammers that ignore armor. As this !!SCIENCE!! shows,
Alright, humans, 10v10, no skills, steel picks vs silver whips, 5 spaces apart
Unarmored:
Trial 1: 1 Miner surviving
Trial 2: 5 Lashers surviving
Trial 3: 7 Miners surviving
Even much?
Armored (full bronze, no shields):
Trial 1: 5 Lashers surviving, (I gotta note, hindsight, every single one of them were on the ground and multiple reds/missings
Trial 2: 6 Miners surviving, (all on foot)
Trial 3: 8 Miners surviving, (6 on foot)
Armored (full steel, no shields):
Trial 1: 10 Lashers surviving
Trial 2: 9 Lashers surviving
Trial 3: 10 Lashers surviving
That, was quite the Coup de main they had in that last round.
Good bout, I must say, they're even.
At unarmored, it's mostly luck as to who wins.
At slight armor, picks took the field, but likely by luck.
When armor material is on-par with the pick's material, the whip mops the floor with it as the pick is deflected and the whip strikes through and paralyzes with pain.
Whips and Picks are the most powerful weapons in a relative sense, but while whips disable fast, picks score kills.
Bronze Collossus vs Silver Whip = collossus disabled, but impossible to kill
Bronze Collossus vs Steel Axe = some hits but no kill shot
Bronze Collossus vs Steel Pick = kill shot
Oh, and here, you should like this:
http://df.magmawiki.com/index.php/DF2010:Weapon