here is the whole script if you need that

var user = '581949a4136f4b80ce8b7d576144b08d';
var arrayUtil = new global.ArrayUtil();

var uat_software_array = [];
var uat_software_array_display = [];
var new_job_title_software_array = [];
var new_job_title_software_array_display = [];
var add_add_gen_access_array = [];
var remove_add_gen_access_array = [];
var add_add_gen_access_array_display = [];
var remove_add_gen_access_array_display = [];

var new_job_title_software_string = "";
var uat_software_string = "";
var uat_software_string_display = "";
var new_job_title_software_string_display = "";

var counter = 0;

function QueryUAT()
{
var gr = new GlideRecord('u_user_access_list');
gr.addQuery('u_user', 'bdb4e9601341b2006bda75c36144b062');
gr.addQuery('active', true);
gr.query();
while(gr.next())
{
uat_software_string += gr.u_service + ',';
uat_software_string_display += gr.u_service.getDisplayValue() + ',';
}

uat_software_array = uat_software_string.split(',');
uat_software_array.length --;

uat_software_array_display = uat_software_string_display.split(',');
uat_software_array_display.length --;
gs.addInfoMessage("Current Software - " + uat_software_array_display.toString());
}

function QueryNewJobTitle()
{
var gr = new GlideRecord('x_prole_emp_onb_employee_onboarding');
gr.addQuery('u_job_title', 'e9885e5113268bc08242335fd144b0f7');
gr.addQuery('u_list_location', 'Draper Headquarters');
gr.query();
while(gr.next())
{
new_job_title_software_string += gr.u_add_gen_access + ',';
new_job_title_software_string_display += gr.u_add_gen_access.getDisplayValue() + ',';
}
new_job_title_software_array = new_job_title_software_string.split(',');
new_job_title_software_array.length --;

new_job_title_software_array_display = new_job_title_software_string_display.split(',');
new_job_title_software_array_display.length --;
gs.addInfoMessage("New Software - " + new_job_title_software_array_display.toString());
}

function ArrayDiff()
{
add_add_gen_access_array = arrayUtil.diff(new_job_title_software_array, uat_software_array);
add_add_gen_access_array_display = arrayUtil.diff(new_job_title_software_array_display, uat_software_array_display);

remove_add_gen_access_array = arrayUtil.diff(uat_software_array, new_job_title_software_array);
remove_add_gen_access_array_display = arrayUtil.diff(uat_software_array_display, new_job_title_software_array_display);
gs.addInfoMessage("Add This - " + add_add_gen_access_array_display.toString());
gs.addInfoMessage("Remove This - " + remove_add_gen_access_array_display.toString());
gs.addInfoMessage('Remove Length - ' + remove_add_gen_access_array.length);
}

QueryUAT();
QueryNewJobTitle();
ArrayDiff();