How object equality works in Extendscript?

Hello All,

Can someone explain how object equality works in the Premiere Pro?

I am bit confused with following two different outcome

app.project == app.project // returns true
app.projects[0] == app.projects[0] // returns false

Why it behaves differently with same type of object?

Premiere Pro Version: 12.0.0
Extension Type: Panel

Thanks & Regards,
Meet Tank