Is it better to add a conditional inside or outside of a for loop for cleaner code?

So this may sound simple, but I have a method that has a for loop inside, inside the forloop the method createprints needs a map of "parameters" which it gets from getParameters, now there are 2 types of reports, one has a general set of parameters and another has that general set and a set of its own.

I have two options:

Either have 2 getparameters method, one that is general and another that is for rp2 but also calls the general parameters method. If I do this then it would make sense to add the conditional before the for loop like this :

    theMethod(){

        if (rp1){
            for loop{
                createPrints(getgenParameters())
                do general forloop stuff 
           }
        }else{
              for loop{
                createPrints(getParameters())
                do general forloop stuff
                }
        }
    }

This way it only checks once which parameters method to call instead of having the if statement inside the loop so that it checks every iteration (this is bad because the report type will never change throughout the loop) but then this way, repeating the for loop looks ugly and not clean at all, is there a cleaner way to design this?

The other option is to pass in a boolean to the get parameters method and basically you check inside which type of report it is and based on that you create the map, this however adds a conditional at each iteration as well.

From a performance perspective, it makes sense to have the conditional outside the loop so that its not redundantly checked at each iteration, but it doesnt look clean, and my boss really cares about how clean code looks, he didnt like me using an if else code block instead of doing it with ternary operators since ternary only uses one line (i think performance is still the same no?).