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I really can't say I know the difference in spaniels.
I do know there's a major difference in field and bench-bred labs.
I have a bench-bred female and she's a very sedate, calm dog with a very self-assured attitude. She's got a wide, blocky look that's almost hinting of a rottie from a distance. She's content to be a couch potato and cuddle as much as she can.

I have 2 field bred labs and they're far more active, excitable and needy of large amounts of exercise. They're much narrower bodied, longer nosed, love to run and run and run... They're loving, but in a much more frantic, bouncy way. They'll lick you to distraction.

If it's the same for spaniels, they're very different dogs.