Simplicity 404 990390 vs Simplicity 450

Verdict: Simplicity 404 990390 vs Simplicity 450

The Simplicity 404 990390 and the Simplicity 450 are both lawn tractors — here is how they stack up on the figures that matter. Simplicity 450 leads on rated power with 5 hp against 4 hp. Simplicity 404 990390 is the newer design (1967 vs 1958). In short: choose the Simplicity 450 for outright pulling power, or the Simplicity 404 990390 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.