You didn't even read the article you posted since it comes to the opposite conclusion

> Was Soviet caloric intake higher than the US'?

No. In saying this, I'm saying the FAO is wrong, and that Robert Allen, who based his calculations in FAO data (and used their multipliers), didn't notice. To say this, I had to go through a full literature review, and I come to this opinion. Before reading my post, you were totally justified in believing that caloric intake was higher.