As a Leonberger owner for 22 years and someone who has fostered for a Newfie rescue, the Leo ins hands down. Newfies have a smell, whether it's from all the drool down their front or from the extra oil in their coat, but they SMELL. Leos don't drool and don't have an oily coat. IMHO The Leos I've had have been much longer lived and healthier than the average Newfie. My Leonbergers average 12-13.5 years old, and none have ever had hip issues or any health issues. One of my friends has Newfies and says they all have terrible hip issues and hers are in terrible shape by 8 years old. I have an Aunt who has done Saint Bernard Rescue for 35 years and many of hers never make 8 years old. The only other giant breed we've had as healthy as our Leonbergers is a Pyrenean Mastiff, in my avatar. He was 165 lbs and lived to 13.5 years old. He had a totally different function that a Leonberger and was our guard dog. We will definitely have another Pyrenean Mastiff.just out of curiousity: What extra Leonberger gives you that Newfie does not?
I've also worked for vets and fostered almost 1000 dogs in 22 years. My other favorite breeds are: English Shepherds, Border Collies, Black English Labradors, Irish Wolfhounds, Borzoi. Shiba Inus are one I didn't pick but have 2 that are very low demand dogs, other than bathing/brushing. They are all VERY different and I like them for different purposes, but each has a niche they fit into.