DS1 is 4y3m. DS2 is 1y3m. DS2 is less work. He just carries on and does his own thing all the time. I can get quite a bit done with him underfoot, without having to deal with loads of requests and questions.
Yet I'm sure DS1 was more work at one year than he is now.
Also, whenever I borrow other people's kids, I find only kids to be the hardest work, followed by first children. Second, or better still middle kids are easy!
Is this true for everyone?