Before choosing my first cocker I researched the two strains - somewhere I read an article which said the fundamental difference between the two is that after a long day out walking, the show type will happily fall asleep and just as you settle down for the evening, the worker will bring you their lead for their usual walk
Mark has a good point - they are all different with different needs and energy levels. My show type needs a 'job' to keep her mentally stimulated and is fairly high energy/on the go a lot even at 5 years old. My working cocker spaniel is now 18 months old and in a different league energy wise - mx5 v Ferrari
A great deal depends on what you want to do with your dog? If you are looking for a companion with lower exercise needs a show type may be the answer although be prepared that they need grooming every week (every day if you want them to have long feathers). If you want to do agility, fly ball, scent work, trailing, or work the dog then the wcs may be better for you. Either way, I cannot emphasise the need to research lines - as Mark says, at all hinges on the breeding! IMO
Jayne
