1. Input Error Parameters (Input Bias Current & Input Offset Voltage): The ISL28217 features significantly lower input bias current (80 pA) and input offset voltage (8 µV) compared to the MC1458DT (30 nA, 1 mV), by approximately three to four orders of magnitude. In precision amplification, sensor signal conditioning, or high-impedance source applications, using the MC1458DT would introduce DC errors tens to hundreds of times greater, severely degrading system accuracy. 2. Operating Voltage and Temperature Range: The ISL28217 supports a wider supply range (4.5-40V) and an industrial temperature range (-40°C to 125°C). The MC1458DT's voltage range (5-30V) and commercial temperature range (0°C to 70°C) indicate its suitability for benign, general-purpose applications. It may fail or exhibit degraded performance in high-voltage, wide-temperature, or low-voltage single-supply systems. 3. Quiescent Power Consumption (Supply Current): The ISL28217 has a quiescent current of 440µA per channel, significantly lower than the MC1458DT's total quiescent current of 2.3mA. This is a critical factor for battery-powered or low-power devices, as the MC1458DT would substantially reduce system standby time. 4. Technology Generation and Design Philosophy: The parametric differences stem fundamentally from the two devices belonging to entirely different product generations. The ISL28217 utilizes advanced processes to achieve "precision, low-power" characteristics, whereas the MC1458DT is a classic general-purpose op-amp designed to meet basic functionality and low cost, not performance optimization.