eHPRD is EVDO that is routed through an LTE core. eHPRD is just a software layer on the EVDO radio that allows the handoff for EVDO to LTE to be seamless. eHPRD can be faster than EVDO since it is being routed through a completely different core router than EVDO that is usually closer placed. For example, the one here in Davenport, IA is routed through Chicago(175 miles) instead of Kansas City(350 miles), so ping times are now below 100ms. eHRPD can't go over 3.1MBit either since it is EVDO.
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