Size
The Pembroke Welsh Corgi is a little larger on average: about 11 kg (23 lb) as an adult, against 8.8 kg (19 lb) for the Shiba Inu.
Lifespan
In UK vet records the Shiba Inu lives longer: a median of 14.6 years, against 13.2 for the Pembroke Welsh Corgi.
Grooming
The Pembroke Welsh Corgi needs more grooming, brushing a few times a week, where the Shiba Inu needs a brush once a week.
Exercise
Plan for plenty of exercise with the Pembroke Welsh Corgi, and a moderate amount with the Shiba Inu.
Temperament
They differ most on independence (Pembroke Welsh Corgi: keen to work with you; Shiba Inu: decides for itself) and on affection (Pembroke Welsh Corgi: affectionate on its own terms; Shiba Inu: likes its own space).