# [R], 41 bytes

<!-- language-all: lang-r -->

    function(v)rank(c(6,0,5,1:4*0,1:3)[v])[1]

[Try it online!][TIO-jjkhewbr]

[R]: https://www.r-project.org/
[TIO-jjkhewbr]: https://tio.run/##Zc9BCsIwEAXQfU/xoZtEgiS1lSKNFykuYkxp0SbSiV6/hmpFcDMM/zMPZpo7PXcPb@MQPHvyyfgrs2wvpKiEOpQbmeaOt88Tb9VpzlFgdMYTjgLqszZp3VbQOsu6dKsESs6R4wgwYx3IhskRlMI9DD5S6tdMfqNumChiIGBMDWJvPMjZ4C98UWuB3aI2Sa3X@yKlX1/@KDdH9I9UAsWCaA1WwfhL@uccYv82IPn8Ag "R – Try It Online"

The function returns `2` for `'greater than'`, `1` for `'less than'`, `1.5` for `'equal'`

**Explanation :**

          c(6,0,5,1:4*0,1:3)[v]          # extract the score of each card in v;
                                         # cards in v are used as indexes in the cards rank 
                                         # vector, which is based on briscola scores vector 
                                         # c(11,0,10,0,0,0,0,2,3,4) but divided by 2 and rounded 
                                         # to integer preserving the original order

    rank(                      )[1]      # rank returns : c(1,  2)   if v[1] < v[2]
                                         #                c(2,  1)   if v[1] > v[2]
                                         #                c(1.5,1.5) if v[1] == v[2]
                                         # and we select the first value