Iam, you had two back to back maternity leaves, you say you took two years. Therefore you will only have a year of having to pay full-time childcare for two babies, at the same time.
A mother of twins gets one maternity leave. So will have 2+ years of paying full-time childcare for two.
Your children are unlikely to be in the same year at school. So you won't have double to pay for in school residential trips. You can spread the cost over two years.
I don't understand why you cannot use 'hand me downs'. Presumably you are saying your babies wear the same size clothing? This seems strange, especially when your younger baby was a newborn.
You were breastfeeding, great! BF rates are much lower in multiples because it is exceedingly difficult to manage, much much harder than singleton babies. I wouldn't fancy paying for formula for twins, would you?
There's loads of reasons why it is different, but it tends to be the case that people can only see their own issues.
I do sympathise, I wouldn't have liked to have such a small age gap, hence us going to extremes to prevent it. I actually did want twins though! A throw back to my love of sweet valley twins I think 