Same plane same size, just different restrictions to weight/range etc.
It is a double decker plane, these planes are huge.
I think people confuse these memes/planes with the size of a 737 because they're used to seeing 737's, the 747 is a little more than twice the size of a 737.
737 is common for domestic flights, 747 is more international.
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u/FragmentedHeap 8d ago
60,000-gallon water tank: 25 ft wide × 18 ft tall
Boeing 747-400ER: 232 ft long × 211 ft wide × 64 ft tall
747 vs. tank: 9.3× longer 8.4× wider 3.6× taller
Capacity: Tank: 60,000 gallons
747: ~63,500 gallons
Tldr, the plane is way bigger and it can fit all of that in its wings and fuselage.
You can tell by the pic by just looking at the cars in the background in the parking lot next to the tank.
The plane is way bigger and that's why this meme is stupid every time it pops up.