I think the Weatherby/Howa is the better rifle, but the Remingon is significantly lighter. Short of spending a lot of money, the Howa will be a little better made, probably have a better barrel, and has a better extractor and safety. Greater weight may be a disadvantage or an advantage - depends how much walking she'll be doing. Remington is the best basis for a rifle that you want to customise a little, though there are quite a few options for the Howa now, too.
Personally, i'd get the Howa/Weatherby.
