TDA7388 is an ordinary power amplifier chip, 4*40W, most cars are this chip and its copycat chip. TDA7850 is ST's high-end MOS tube sound chip, 4*50W, it is said to have real sound and large thrust. Pioneer's custom model is called PA2030, with a larger thrust of 4*60W. The previous generation of the TDA7850 is the TDA7560, which is also a MOS tube with a slightly smaller thrust of 4*45W and a slightly larger heat.
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7388,7850,7560 chip peripheral circuit is basically the same. The 7388 ground capacitance is 470uF except for one pin 6. Capacitance estimates are filtered and should have little effect. 7850 is exactly the same as 7560.