In Pratikraman, Vandana is done more than once because each one has a different purpose. So yes, both are not the same.

Simple meaning:

1. First Vandana

It is done to show respect, humility, and to take permission before beginning the sacred प्रक्रिया of pratikraman.

1. Second Vandana

It is done to bow again after reflection, to express repentance, forgiveness, and completion of the practice.

Why two times?

Because Pratikraman has two important stages:

• Entering with reverence
• Leaving with repentance and submission

So the second vandana is not a repetition only for formality — it marks a different spiritual step.

Why they are not same?

Because one is for:

• veneration / permission

and the other is for:

• forgiveness / closing with humility

In Jain Dharma, such repetition is not useless; it deepens vinay, vinamrata, and kshamābhāva.

If you want, I can also explain which two vandanas are used in your specific Pratikraman text and how they differ line by line.