Someone will always be messier than the other and/or not pull their weight in the house.
In our house, DH is the oblivious one and I'm the noticing one. Not that I'm a neat-freak! I'm just a little less messy than DH
I clean the common areas and mine. I tell him to make his workspace and plant-growing area presentable when we have company over. He's the early riser and cooks breakfast (without cleaning up or anything), and does all the yard work. I do the house, which is more work on a daily basis.
It is what it is. You need to work out some agreement with him then everyone needs to do their assigned part.