Patterdale vs JRT

Someone I know is interested in these two breeds. I am wondering if anyone who has experience with both could tell me how they are similar and different. I have a cousin with JRTs so I know a little about them. But my knowledge of Patterdales is pretty limited (I have met one..briefly)

Thanks for any Chaz info!

I have met only a few patterdales, and know a few people on line who have them. They tend to be very similar to JRTs but are usually less drivey/edgy.