They are two differnt types of carriers. I have a ergo and also a mai tai carry not the kozy a himmel and a baby hawk.

I use them at differnt times for different reasons. Ergo when it is raining etc so don't drop straps on the ground, and also is dh is going to carry her more often than me that day (he perfers clips than tying) I use the himmel the most for extended carriering as i find it the most comfortable.

If you can I would see if there is anywhere that you can try them on and your husband and see which one you prefer, or get both lol.