This study compares the mechanical properties of 3D-printed ABS filament and ABS-like resin using fused deposition modeling (FDM) and stereolithography (SLA) technologies. The research investigates how variations in 3D printing technology and infill density affect mechanical parameters such as Young's modulus, tensile strength, strain, nominal strain at break, maximum displacement, and maximum force at break. Tensile testing was conducted to assess these parameters. The results show that SLA-printed specimens consistently exhibit superior mechanical performance compared to FDM-printed ones, particularly in terms of tensile strength, displacement, and Young's modulus. For example, SLA-printed specimens at 30% infill density showed a 38.11% increase in average tensile strength compared to FDM counterparts, and at 100% infill density, a 39.57% increase was observed. Similarly, the average maximum displacement for SLA specimens at 30% infill density increased by 14.96% compared to FDM specimens, and at 100% infill density, by 30.32%. The average Young's modulus for SLA specimens at 30% infill density increased by 17.89%, and at 100% infill density, by 13.48%. In contrast, FDM-printed specimens with 30% infill density showed an average strain of 2.16%, while those with 100% infill density showed a slightly higher deformation of 3.1%. SLA-printed specimens at 30% infill density exhibited a strain of 2.24%, while those with 100% infill density showed a higher strain value of 4.15%. The study concludes that SLA technology offers clear advantages in terms of mechanical performance, making it a promising option for producing ABS and ABS-like resin materials with enhanced mechanical properties. The findings highlight the impact of infill density on the average nominal strain at break, showing improved performance in FDM and significant strain endurance in SLA. The research also indicates that increasing infill density in FDM does not significantly improve deformation resistance, while in SLA, it leads to a substantial increase in deformation, raising questions about the practicality of higher infill densities. Overall, the study demonstrates that SLA technology provides superior mechanical performance compared to FDM, making it a preferred choice for producing high-quality ABS and ABS-like resin materials.This study compares the mechanical properties of 3D-printed ABS filament and ABS-like resin using fused deposition modeling (FDM) and stereolithography (SLA) technologies. The research investigates how variations in 3D printing technology and infill density affect mechanical parameters such as Young's modulus, tensile strength, strain, nominal strain at break, maximum displacement, and maximum force at break. Tensile testing was conducted to assess these parameters. The results show that SLA-printed specimens consistently exhibit superior mechanical performance compared to FDM-printed ones, particularly in terms of tensile strength, displacement, and Young's modulus. For example, SLA-printed specimens at 30% infill density showed a 38.11% increase in average tensile strength compared to FDM counterparts, and at 100% infill density, a 39.57% increase was observed. Similarly, the average maximum displacement for SLA specimens at 30% infill density increased by 14.96% compared to FDM specimens, and at 100% infill density, by 30.32%. The average Young's modulus for SLA specimens at 30% infill density increased by 17.89%, and at 100% infill density, by 13.48%. In contrast, FDM-printed specimens with 30% infill density showed an average strain of 2.16%, while those with 100% infill density showed a slightly higher deformation of 3.1%. SLA-printed specimens at 30% infill density exhibited a strain of 2.24%, while those with 100% infill density showed a higher strain value of 4.15%. The study concludes that SLA technology offers clear advantages in terms of mechanical performance, making it a promising option for producing ABS and ABS-like resin materials with enhanced mechanical properties. The findings highlight the impact of infill density on the average nominal strain at break, showing improved performance in FDM and significant strain endurance in SLA. The research also indicates that increasing infill density in FDM does not significantly improve deformation resistance, while in SLA, it leads to a substantial increase in deformation, raising questions about the practicality of higher infill densities. Overall, the study demonstrates that SLA technology provides superior mechanical performance compared to FDM, making it a preferred choice for producing high-quality ABS and ABS-like resin materials.