I have one of each, and they are totally different! That said, I really think it's about the way they are brought up, and very much like people, you get variety in both breeds!
My show, Chops, is 10 and has never really played (he used to chase Chewitt to steal the ball, but once he had it he wasn't interested) he's quite a lazy boy, is quite happy with his walks, and a bed, and doesn't seem to want much else!
Chewitt my first show cocker was mental

chewed anything and everything for the first 2 years of his life, and always behaved like a kid on blue smarties!! He was perfect, always keen for walks and had a big love of life

(he sadly had to be pts at 8, liver tumours

)
Smartie on the other hand is a worker, and is again, perfect! She plays, enjoys a couple of hours walk a day, and is the most loyal, loving dog I've ever known. If it's quiet time, she knows, and will sleep (I know alot of workers are hyper ALL the time!)
TBH, when I got her, I didn't know there were 2 types, and went into it totally blind. Thankfully the gamble payed off!
Whichever you decide is best for you, they are the most loyal, faithful, devoted and gentle dogs I have ever known, and can't imagine myself ever having a different breed!