A shared width does not mean an identical machine.
The wheeled H-550S-T and tracked H-550L-A both list 550 mm mowing width, 9 HP engine power and 300 m remote range. The H-550S-T lists 99 kg net weight and a 30–70 mm cutting-height range. The H-550L-A lists 141 kg net weight and 10–200 mm cutting height. Both show a 45° catalog maximum gradient, but that shared headline does not establish equivalent behavior on loose soil, wet ground or side slopes.
Describe where the machine actually travels.
For maintained grass and open lawns, review the wheeled series and the finish it is expected to leave. For uneven, softer or rougher ground, inspect the tracked 550 series and ask about traction, turning and ground disturbance on the actual surface. Neither drive type makes a site automatically safe: holes, edges, hidden objects and weather still affect use.
The lightest model is not necessarily the easiest to deploy.
The detailed model tables list unit dimensions of 1020 × 980 × 540 mm for H-550S-T and 930 × 900 × 550 mm for H-550L-A. Listed gross weights are 139 kg and 179 kg respectively. The catalog summary fields show different dimensions for these models, so request a current drawing, packing list and written confirmation before arranging transport. A narrow gate and a high trailer ramp can be more restrictive than the field itself.
Choose by the output you need.
Share photos of grass height, slope, wet sections and obstacles, plus how often the area is maintained. Ask for video of the exact head type working on comparable material. If you need to cut taller rough growth rather than maintained grass, also examine the flail line; do not assume that every 550 mm mower has the same blade system.
Wheels or tracks for your site?
Send photos and the narrowest access measurement through quick quote so the recommendation is tied to your conditions.