Welcome @Kimjunho, to the community!
In fact, both PFC devices are almost identical and also pin-compatible. However, there are some small differences, e.g. the values of the maximum current consumption (quiescent current, operating supply current), the gain of the multiplier or the suitability of the L6562AT for extreme outdoor temperature ranges (data sheet, page 1).
Does it answer your question?
Regards
/Peter
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