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This study presents a comprehensive comparison between Resistance Spot Welding (RSW) and Laser Spot Welding (LSW) in sheet metal fabrication. We investigated the mechanical properties, microstructure, and process efficiency of welds produced by both methods on various sheet metal materials, including low carbon steel, stainless steel, and aluminum alloys. The study employed tensile-shear tests, microhardness measurements, and microstructural analysis to evaluate weld quality. Additionally, we assessed the energy consumption, production rate, and overall cost-effectiveness of both welding techniques. Our findings reveal that while RSW remains a robust and cost-effective method for many applications, LSW offers superior precision, flexibility, and quality for specific high-performance applications. This comparative analysis provides valuable insights for manufacturers in selecting the most appropriate welding technique for their specific sheet metal fabrication requirements.