There are a number of differences between these two breeds starting from the early beginnings where some people have said that the older Cardigan Welsh Corgi's were from Cardiganshire, possibly brought there by the Celts in 1200BC. While the Pembroke Welsh Corgi's ancestors were thought to be introduced by Flemish weavers to the Celts in the 1100BC.

Either way they were interbred and considered the same breed until 1934 where the two different breeds were identified and separated from then on.

The most obvious distinction between the two breeds is that the Pembroke Welsh Corgi has a natural bob tail (short tail) or sometimes born without a tail. They also have straighter legs due to the shorter body length. Their head is generally in a wedge- shape with smaller ears that are situated close together as well as they tend to be the lightest breed between the two. They have been known to have a higher risk for hip dysplasia.

The Cardigan Welsh Corgi's tend to me more active than their counter-part and need regular exercises. They are also slightly larger in size but have shorter legs and have their full tail. There are more colors and patterns in this breed as well as being the less common breed between the two. Their coat is generally a bit wiry in comparison, but both breeds have a double coat fur for weather resistance. With much shorter legs than the Pembroke, this helps them when they role away from the dangers of kicking cows.

Their personalities may differ slightly as the Cardigan Welsh Corgi is said to be more reserved, although both are quite stubborn, the Pembroke Welsh Corgi tends to be more tolerant of other non-canine animals in the household.

The Pembroke Welsh Corgis are also the favorite breed of Queen Elizabeth II who owns quite a few; they have been favored for over seventy years within the British Royalty. At last count she owned 16 of them.

As part of the history between these two breeds there are two theories in regards to their origin:
That some Cardi's were cross bred with the Swedish Vallhund Dogs, or some of the orginial Pem's evolved from the Cardi's and other dogs, including Pomeranian, Schipperke and other Spitz-type dogs.

In general these two lovable breeds are extremely similar in looks; intelligence and temperament, but still have their slight individualisms and traits that stand them apart.