We report here a comparative study of the effects of La substituted Ca on (Bi, Pb):2212 and (Bi_, Pb):2223 superconductors with various La content (0.00 ≤ x ≤ 0.30). Regardless of the effects of La, it is evident that superconducting volume fraction, excess of oxygen, critical concentration for quenching superconductivity, Vickers hardness, anisotropy, interlayer coupling, critical magnetic fields, and critical current are higher for the 2212 series than the 2223. In contrast, orthorhombic distortion, c-parameter, crystallite diameter, doping distance , distance between two Cu-atoms, hole carrier/Cu ion, melting temperature T_m, critical temperature T_c, onset of diamagnetic T_cM , surface energy, elastic component, resistance pressure, and c-axis coherence length are higher for the 2223 series than the 2212. An inverse linear relationship between T_m and T_c is estimated for both series, and for RT BSCCO superconductors, the required T_m values should be 1048.03 ^oC for the 2223 series and 784.48 ^oC for the 2212. Surprisingly, the difference in temperature between zero resistivity and diamagnetic onset |T_cM-T_cR| for La = 0.30 samples is 30 K. In the critical field region (CFR) , the exponents of order parameters (OPD) are 2D, but their values are higher for the 2212 series than the 2223. Further, they became 3D as La increased to 0.30, due to the reduced effective length in highly substituted samples. Our results are discussed with the help of the differences in the physical parameters between the considered series. These findings reveal that the 2212 series is more suitable for applications that need higher hardness, and critical fields and currents. In contrast, the 2223 series is more suitable for research for higher T_c and altering plastic deformation. To our knowledge, the present systematic investigation may never have been reported elsewhere, which highlights the present work.