A few cases

Tobacco and TMV     0.8308    Human and Dengue     0.440
Tobacco and Dengue  0.5651    Mosquito and Dengue  0.4165

Human and Chicken   0.9802    FluA and FluB    0.9035
Chicken and Flu A     0.4664   Human and FluA  0.4219
Chicken and FluB      0.3947   Human and FluB  0.3309

Bunyaviruses    Human    Mouse   Tomato   SpotW   Hanta   
        Mouse |   0.9929   
      Tomato |   0.3424   0.3421
       SpotW |   0.3896   0.3803   0.8610
        Hanta |   0.2705   0.2530   0.8206   0.8000
    Lacrosse |   0.2293   0.2133   0.7265   0.8340   0.8340

These numbers are not great, but there are some trends.
Codon usage not independent, we would need to correct for that.