This chapter merges the conventional Froude similarity laws with the isomorphic floater development strategy. Experiments were conducted on model-scale C–HS and SB–3 floaters in a lab-scale wave tank, considering both regular and irregular waves, to determine whether replacing the C–HS floater with the SB-class floaters would be equally advantageous for real-time application in the PA-WECs deployed in realistic waves and suboptimal mode. This chapter standardizes the procedure of combining the isomorphic floater development strategy \(\{D,M,V,{\omega }_{n},{C}_{pto}=\text{constant}\}\) with the traditional Froude similarity analysis for the experimental investigation of unconventional floaters against the old-style floater geometries. The greater heave response of the SB–3 in both within- and outside-resonance scenarios justified its superiority over the C–HS for optimal wave energy extraction. A similarity analysis was also conducted to correlate the PA-WECs on model and prototype scales.