Well...hmm...I've spent years working and playing in many different types of goretex boot and boots without waterproof breathable (wb) laminate. I have found that in wet conditions, my feet remain dryer in goretex boots. However, if you are working hard, your feet sweat a great deal and easily overpower the breathing ability of the laminate, so you may not be able to tell the difference.
One thing I rarely see mentioned in adds is if the goretex bootie is seam sealed inside the boot. I don't know, but if it's not, water will leak right through the seams to your feet. I still think it's important to treat the leather, etc. to repel water just like you do for wb laminate jackets, etc. Just like on a wb laminate jacket, if the dwr coating is old, etc. and doesn't work anymore and the surface fabric 'wets out' (water doesn't bead up on it, but soaks inot the fabric), the wb laminate will not be able to breathe very well and you then essentially have a very expensive rain jacket with breathability not much better than a $20 vinly rainjacket.
Same concept applies to footwear. I think it's important to talk to the boot manufacturer and see what they reccomend for this purpose and determine from that in part if you want to buy their boot.
It's my understanding that feet have more sweat pores per square inch than any other part of your body so it's no wonder feet are often wet and smelly!