Simplicity 400 990234 vs Simplicity 401 990357

Verdict: Simplicity 400 990234 vs Simplicity 401 990357

The Simplicity 400 990234 and the Simplicity 401 990357 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 4 hp. Simplicity 401 990357 is the newer design (1965 vs 1961). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.