i've worked and stayed at home, and in my experience, staying at home is much easier for me overall. everyone's situation is different (some people's husbands, families, friends, etc. play a huge role in helping raise their children, and others have husbands who travel or are deployed and are virtually raising their kids as single parents), so i don't think it's right to make a generalization either way that working moms or stay at home moms have it harder. most of the challenges i've experienced as a stay at home mom i also experienced as a working mom--it is just seems to never end when you are with your kids 24/7.
(this pic was after baths tonight...still just as rowdy as at lunch!)