You'll notice the size difference immediately. The Rottweiler stands 56–69 cm (22–27 in) tall and weighs 36–60 kg (79–132 lbs), making it considerably larger than the Cocker Spaniel at 34–39 cm (13–15 in) and 11–14 kg (24–31 lbs).

If kids are part of the equation, the data is clear: the Cocker Spaniel scores 5/5 with children while the Rottweiler manages 3/5. The Cocker Spaniel is naturally patient and gentle around young ones.

The lifespan difference is significant. Cocker Spaniels live 12–15 years on average, while Rottweilers live 8–10 years.

Both breeds shed at the same rate (3/5), so fur management will be identical for either choice. Expect a moderate amount of loose fur from both.

The Rottweiler needs slightly more exercise (4/5) than the Cocker Spaniel (3/5), but neither breed is at an extreme. Both have high to high energy levels, so the difference in your daily routine will be modest — perhaps an extra 15-20 minutes of activity for the Rottweiler.

Both breeds cost a similar amount upfront — $800–$2,000 for a Cocker Spaniel versus $1,000–$3,000 for a Rottweiler. Where the real cost differences emerge is in ongoing expenses.

When you live with a Cocker Spaniel, you'll notice their happy, gentle and smart character in everything they do. A Rottweiler, by contrast, shows a loyal, confident and protective nature.

Both breeds score 4/5 for trainability — you'll have a similar experience training either one. Both are cooperative, eager learners.