R, 43 bytes
function(v)rank(c(11,0,10,1:4*0,2:4)[v])[1]
If the input vector is not acceptable, then a possible 2-parameters alternative is :
R, 51 bytes
function(a,b,x=c(11,0,10,1:4*0,2:4))sign(x[a]-x[b])
digEmAll
- 5k
- 14
- 22