Upgrade subwoofer from PSW505 to PSA VX15se. Worth it?

Hi, my current subwoofer is a polk psw505, lately I've been thinking about replace it with a Power Sound XV15se.
My room is a dedicated theater room of about 2400 cubic feet, we use it for about 80-90% movies. Would it be a good upgrade? will I really notice a real improvement like a night and day? or just a minor improvement? Thanks guys in advance for all your help.

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