Simplicity Axion 21/42 vs Simplicity ZT1500 21/42

Verdict: Simplicity Axion 21/42 vs Simplicity ZT1500 21/42

The Simplicity Axion 21/42 and the Simplicity ZT1500 21/42 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 21 hp. Simplicity Axion 21/42 is the lighter machine (226 kg vs 240 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Simplicity ZT1500 21/42 is the newer design (2012 vs 2010). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.