I see no reason to get a 41 mag it serves no purpose for me. I know lots of people like em. I think the 44mag is fun to shoot and more versatile whether you hand load or not. I don't need anything between 357mag and 44 mag personally. Just like I don't need anything between 44mag and 500. Don't really need a 500 either but I want one which is really all the reason ya need to get anything lol.
44 mag is going to be easier to find ammo for
44 mag has wider variety of loads both factory and handloading
44mag is going to be easier to resell should you have to someday.
I personally see no cons to the 44 mag
Someone else will have to make ya a pro list for 41mag