Traditional risk scores (TRS) such as Framingham, WHO, and Globorisk guide preventive decision-making by predicting future cardiovascular events using conventional risk factors. However, their reliance on population-based models limits their ability to capture underlying subclinical vascular damage, thereby restricting granular risk differentiation and effective personalized prevention. To address this limitation, we propose a Unified Vascular Score (UVS) that integrates arterial stiffness-based vascular health markers. In a study of 205 participants, we have validated UVS against TRS, and investigated its ability to further capture vascular heterogeneity across age–hypertension phenotypes within and across TRS risk strata. Inter-score comparison showed moderate agreement among TRS, with Globorisk aligning most closely with the consensus stratification (87%). When compared with TRS frameworks, UVS demonstrated a consistent monotonic increase across low-to-high risk strata. While TRS grouped all four physiological subgroups (Young Normal, Young Hypertensive, Old Normal, Old Hypertensive) within the same low-risk category, the proposed UVS revealed clear separation among them. This preserved discrimination highlights underlying vascular heterogeneity and demonstrates the ability of UVS to capture biologically meaningful differences that remain masked within conventional categorical risk stratification. These findings suggest that UVS complements traditional risk models while providing finer resolution within each risk category, enabling improved detection of subclinical vascular differences among individuals with similar conventional risk profiles.