Is XSP the same as SPY?

Excuse me, could you please clarify if XSP and SPY are interchangeable or if they represent different financial instruments? I understand that both are often discussed in the context of investments and stock market indices, but I'm unsure if they serve the same purpose or cater to similar investor needs. Could you elaborate on the key differences, if any, between XSP and SPY, and how investors should approach them differently in their portfolios? Thank you for your time and consideration.