Boxlang.json - enable both CF and lucee

What is the expectation when I enable compat for both lucee and CF in boxlang.json, eg:

{
    "modules" : {
        "compat" : {
            "disabled" : false,
            "settings" : {
                "isAdobe" : true,
                "isLucee" : true
            }
        }
    }
}

What happens when there is contradictory behaviour on both platforms?