It is a similar product. However the soil conditions the grain grows in does have an effect on the taste. The earthiness of Maris Otter is a prime example. Using a GW pilsner in a recipe calling for a continental pilsner may result in a slight taste difference. I however wouldn't worry to much about it; just brew a batch and see if you are happy with the taste.
Das Leben is zu kurz um schiess Bier zu trinken