Efficience of profile script vs native functionnality

Hi!
I have got a case that not allow me to use an AB Test to split audience with 50/50.

Exp A (control) > 50%
Group B > 50%
(containing)
  Exp B (visitCount = 1)
  Exp C (visitCount = 2)
  Exp D (visitCount = 3)

To make it work, i have configured a XT activity using a profile script to split audience :

if (!user.get('twogroups')) {
var ran_number = Math.floor(Math.random() * 99);
if (ran_number <= 49) {
return 'ExpA';
} else {
return 'GroupB';
}
}

https://experienceleague.adobe.com/docs/target/using/audiences/visitor-profiles/use-profile-scripts-to-test-mutually-exclusive-activities.html?lang=en

Could you tell me if this method works as efficiently as the native split of an AB Test activity ?