Country: England
It's a bit of a strange question because (and thank f*ck this is the case) Sp*rs lost that final.
I don't think there's any universe where most fans would trade a physical trophy just for a CL run but loss in the final.
However if you were to ask something like would we trade an FA Cup for a redo of the 06 final (11 vs 11 with a competent ref), or a scenario like Sapient Hawk outlined I think that would produce more compelling conversation.
You could even pose the question like would we trade an FA Cup final for the 2019 CL Sp*rs run but we get to play the final out (so it's not already lost) and that would be more contentious.
I don't think there's any universe where most fans would trade a physical trophy just for a CL run but loss in the final.
However if you were to ask something like would we trade an FA Cup for a redo of the 06 final (11 vs 11 with a competent ref), or a scenario like Sapient Hawk outlined I think that would produce more compelling conversation.
You could even pose the question like would we trade an FA Cup final for the 2019 CL Sp*rs run but we get to play the final out (so it's not already lost) and that would be more contentious.