Size
Competition kettlebells are uniform: an 8 kg and a 32 kg have the same external dimensions. Hardstyle kettlebells scale with weight — heavier means physically bigger.
Material & handle
Competition bells are steel with a thinner ~33 mm handle for one clean grip. Hardstyle bells are cast iron with a wider handle that suits two-hand swings.
Which should you buy?
- Choose competition if you train kettlebell sport or want identical feel across weights.
- Choose hardstyle for general strength, conditioning and value.