Two options -- is it clear which one's best?

SpacemanSpiff can either take my 4-sided die or my morphing-12-sided die. It's clear, isn't it, that the best die to take the 4-sided die is his die with value 3, and the best die to take the morphing-12-sided die is his die with value 5. Most people -- myself included -- would probably instinctively do the latter and maybe that is the best move; but there's a case for taking the 4-sided die, too. Is it persuasive?

Tournament #12831: "Beating the stats" tournament for Jl8e Current Round: Round 6. (organized by glassonion)

Top 10 buttons ranked 40-60% overall using which jl8e has played 10 or more games. Please pick randomly.

This game was last modified on Thu Nov 13, 2008 08:24:16

Player: ElihuRoot *Dead Dude* *Fanatic* 
Button Man: Talus    Score: 60 (16.6 sides)   Rounds Won/Lost/Tied: 2 / 0 / 0 (out of 3 round(s))
Captured Dice: Turbo Option 20/30 20-sided die, Option 12/20 12-sided die

Dice	4-sided die	Morphing 12-sided die	20-sided die	X Swing (with 20 sides)
Value	2	4	15	12
Dice	10-sided die	10-sided die	10-sided die
Value	3	5	8

* Next Turn * Player: SpacemanSpiff *One Mean Cat* *Bronze Medal in Men's Long Jump* * Next Turn *
Button Man: Anger    Score: 35 (-16.6 sides)   Rounds Won/Lost/Tied: 0 / 2 / 0
Captured Dice: 20-sided die