I only have a short time period of the last year and a half to share to this topic. Probably not statistically significant! We started with only guinea hens on our 14 acres of forest. Only a small clearing for our house. The guineas stayed close to the coop on the edge of the forest after their adjustment period(locked up) of being trained to know where home was. We had 7. Still after the guineas were let free to forage, we had ticks on us and ticks all over the dog. The guineas would often go to the neighbours and raid their birdfeeders, often staying the night.
When we realized that we had to make peace with the neighbours and that the ticks were still everywhere, we switched to chickens. This spring and early summer so far I have not seen a tick from walking in the chicken area. Beyond this area I have had a tick on me. We only have 3 chickens right now on patrol. They keep close to the home and forest edges where we most frequent.
I have no bias between species, just a short personal experience. This does not take into account the different weather from year to year. However, this past winter being mild, I would have suspected more ticks this spring. I suspect the best results come with a varied flock that is trained well to stick close to home(easier said than done) and by tossing
feed in the areas that you wish the birds to forage so that they will scratch and be attracted to these areas for food source. I hope this helps. Everyone has such a different experience based on the various factors of your land and the personalities of the animals as individuals and as a flock mentality.
All the best feeding whatever tick eating machine you decide.