Zipper it is so much easier then laces
I prefer a zipper but I've heard that they break and get stuck. I haven't had any issues with the zipper on mine so I guess it's up to aesthetic appeal! I have the Ariat Heritage Field Boot and I love it!
I prefer the zipper ones, they do make ones that lace and have a zipper, that's what I always get because I like the convenience of the zipper and the look of the laces. I currently have the ariat heritage contour field boots if you're looking for suggestions
Same choose what u like more
While the lace ups add a nice touch, I think when it comes to convenience the zipper would be faster but honestly your choice.