Why does it matter so much?
There are too many variables, for most, if your job is a sociable, mentally stimulating but not in an overwhelming way and challenging but not exerting. You'll probably find being at home with a baby harder work. I used to work on a challenging behaviour ward where some days I couldn't leave for 16 hours because all hell broke loose, there were assaults, restraints and mayhem going on left, right and centre. If that is less challenging than having a baby then literally no-one would have babies, especially multiple. Or even if it is as challenging, the motivator that you love your baby which makes it much more cushy.
I'm out that job now and self employed, my job is less physically draining but now much more of a mental toll. The risk, the being on the ball constantly etc, it's draining. The thought of having my existence for a short spell just focused on keeping one other person alive seems like a change of lifestyle I would find preferable, at least for a short while.
I do however see how the sahm roll could be harder if you are under valued, under appreciated, 100% of the house work, life admin and organisation falls on you. But that would be from dealing with the resentment, power imbalance aspect of it as opposed to the role itself.
But, I don't think saying anythings easier is negative? Life isn't a competition, I really don't care what others choose to do.