Shall I change duplicated product descriptions if I am top ranking result and was first to publish it?

[lcourse]

about 20% of total 500 products in our shop have a manufacturer product description, which appears repeatedly on maybe 10 other sites and also on ebay and amazon. Issue is just with our own brand. We have another brand website where we publish the same product descriptions as well (google knows that we own both sites).

The product description was first published on shop website before anywhere else and we are ranking number one for the product despite quite strong competition and we outrank our brand website as well.

Which of the following options would you opt for?

1. keeping the description and just adding some unique content
2. replacing the complete product description by a new one

[OlegKorneitchouk]

No way - you don't mess around when you are already ranking #1.

Only do that if your rankings tank.

[LesleyPaone]

This is the best answer. It puts you in a great position as well since it means that a lot of your competitors that are using the same feed will not show up in the SERP's as well. I would expand my monitoring out to more products though and see how you are doing with them.

[lcourse]

thanks everybody.
excellent advice. I will just limit to make some tests of  products for now to see how it will affect ranking.