six and two threes
whatever the case may be
as the case may be
obverse
alternative
between the hammer and the anvil
mixed
between a rock and a hard place
bicriterion
fork in the road
bothridial
trilemma
doubly
dilemma
binary
on the horns of a dilemma
vagrate
champagne problem
wear two hats
up to
either-or
intercriteria
better
ambidirectional
biconceptual
double-handedness
choosable
bispecificity
sidegrade
ideally
elect
two-way
double-handed
pick and choose
pushmi-pullyu
polylemma
reselection
electively
wherebetween
squeeze
you can't be half pregnant
option
contrariwise
biconditional
relative
conceptual inverse
strike a medium
optionlike
intercept
interwork
possibility
beta
valedictorily
a little from column A, a little from column B
double
multicriteria
box and cox
preferably
interdistinguish
opposite
preferable
foretake
fork
intercase
tough call
selected
interfactorial
two-edged
alternize
multiface
ambigenous
bifold
multicriterion
forechoose
intertegular
joint
first dibs
twi-reason
otherwise
bifactorial
multialternative
above
beidellitic
timesaving
differentiate
way to go
choice
diparametric
bisemous
interrelationship
liefer
preferendum
of choice