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We report angle-resolved photoemission spectroscopy (ARPES) on two familiesof high temperature superconductors (Ca$_{x}$La$_{1-x}$)(Ba$_{1.75-x}$ La $%_{0.25+x}$)Cu$_{3}$O$_{y}$ with $x=0.1$ ($T_{c}^{max}=56$ K) and $x=0.4$ ($%T_{c}^{max}=82$ K). The Fermi surface (FS) is found to be independent of $x$ or$y$, and its size indicates extreme sample-surface overdoping. This universalFS allowes the comparison of dynamical properties between superconductors ofsimilar structure and identical doping, but different $% T_{c}^{max}$. We findthat the high-energy ($\left\vert E\right\vert >50$% meV) nodal velocity in the$x=0.4$ family is higher than in the $x=0.1$ family. The implied correlationbetween $T_{c}^{max}$ and the hopping rate $% t $ supports the notion ofkinetic energy driven superconductivity in the cuprates. We also find that theantinodal gap is higher for the $x=0.4$ family.

Linking Dynamic and Thermodynamic Properties of Cuprates; an ARPES study of (CaLa)(BaLa)$_{2}$Cu$_{3}$O$_{y}$