While not all stainless steel options will have higher weight limits, they will generally provide a more stable platform to perform maintenance. Regardless, you should always research the weight of your vehicle(s) to determine what strength ramp is required.
Stainless steel alternatives may not necessarily offer higher weight capacities, but they typically provide a more reliable base for upkeep. However, it's still crucial to investigate the weight of your vehicles to decide on the required strength ramp.