These threads pop up every single year on Mumsnet and, honestly, they're pointless. Sorry.
There are so many factors in play that it's impossible to try to compare.
My DCs have no extended family whatsoever, so no extra presents. I buy them very little outside of birthdays/Christmas, so they wait for the things they'd like.
Household income too - when DC1 was little, I was a lone parent with a tiny budget, so I had to make do with what little I could afford. He got a few bits from Poundland, and car boot sales.
20 years on, I'm in a better situation financially, so all three of my DCs get a good Christmas. Not massive piles, but they do ok.
It seems off to me, talking about how much we'll be spending. Some parents will be spending a shit load, while other parents will be scraping together whatever they can.
Just try to have the best day you can afford, and remember it's not all about how much you can afford to buy.