It comes a week after John Lewis' advert told the story of a magical and unexpected connection between a little girl and an elderly man who lives on the moon.
But now it appears Sainsbury's came out on top, as the supermarket's three and a half minute feature stole the show upon its release on Thursday evening with a heartwarming tale of Mog the Forgetful Cat - according to the internet.
Love the Sainsbury's advert starring Mog the cat. Beats John Lewis hands down in my book!— jo williams (@ruckchick) November 12, 2015
@HuffPostUK mog appeals more to my childhood and it's funny, sad and happy at the same time. Man on the moon just feels so unrealistic— Frank 'n' Hurt Her (@Heroes_Cons) November 12, 2015
@HuffPostUK Best as yet! Loved it!— Baroness Cyborg CM (@CaroleMagoha) November 12, 2015
Sainsbury's has really outdone John Lewis this year. #MogSavesTheDay 🎄🎁— Poppy (@pops_brunt) November 12, 2015
The Sainsbury's Christmas ad is 100x better than the John Lewis one in my opinion. 🐱— L o u ⚓ (@Lou_143) November 12, 2015
The Sainsbury's Christmas advert is a cinematic masterpiece.— Kat-kaesque (@katmsinclair) November 12, 2015
Sainsbury's pull it out of the bag again!! #mog— Richard Bluff (@hastingsbluffy) November 12, 2015
The Sainsbury's Christmas advert outdoes John Lewis' by far— erin (@makebelievelrh) November 12, 2015
Mog, made famous by the quintessential children's books by author Judith Kerr, is faced with a series of unfortunate events where the kitchen catches fire on Christmas eve. She manages to call the fire brigade and save the house - but not the presents and a meal.
Lewis' effort was set to a stripped back acoustic re-version of the Oasis classic Half The World Away, sung by Aurora.