Hmmmm, let's weigh the two against one another...
ELEPHANT - Amazing title, general amazingness, Crazy breakdown, overcame the face of adversity to triumph in the charts
LET IT GO - It's fresher as of now, I like it's 90s/Robin S vibe, not as great a title.
My overall standpoint is that Elephant remains ubnbothered as the greatest song of all time and as such will forever be the better song yet Let It Go came a close second as the second best song of all time and is still 1000000% amazing in every way. I feel Let It Go stands more of a chance of success now that Alex' name is back out there from Elephant's enormous success and so us stanning for it in exactly the same way as Elephant is vital.