Huf Haus isn't the only option here. It's a bit like looking for a car, and only talking about the price of a Lamborghini.
In addition to Big Red Barn mentioned above, I had found these guys a few years ago when I was thinking of building, but that idea was abandoned quickly so I never got into any detail.
There's some indicative pricing for sample houses there. Outside of Galway you need to get someone local to take in the finishing, but they provide indicative pricing for all of this.
In terms of comparing 'like for like' vs traditional build, remember you are getting a passive house with a lot of these. If you look at some of the passive House blogs / sites you'll find other companies, and lots of 1st hand experiences.