Can I replace PT2399 delay by BU9253?

Hi all, I bought a PT2399 delay after reading a detailed introduction article about this device, here's the link:https://www.apogeeweb.net/circuitry/pt2399-delay-features-datasheet-application-circuit.html It says that BU9253 is the alternative of PT2399. But it didn't give me their comparison about specifications. I'm not the expert at delay processors...

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