Cale H.wrote a review of Scarpa Phantom Guide Boot - Men's on April 25, 2013
So, at this level of boot, fit is way more important than anything. I learned this through 4 purchased pairs of boots, all through backcountry.com. Started with testing out the Salewa Pro Gaiters that I demoed for an entire day at Ouray Ice Climbing. So, I purchased a pair. Then realized it was too big and purchased a smaller pair (up to 2 boots now). Then, I decided to weigh these against Batura GTX 2.0s (up to 3 boots now). I took all of these on single or double trips. Meanwhile, I found out that the Scarpa Phantoms reportedly had a easier fit for some folks. I had issues with every other boot here. Some kind of foot pain. Finally, after ordering these and returning all the others after good solid tests - these worked on the first trip out. I had my boot. This made me sad because I really like La Sportiva and enjoyed ice climbing in worn in Salewa boots.
Despite how you feel about which boots you want, find the fit that works. The La Sportivas fit better? Keep them. Scarpas fit better? Keep them.
My point? It works differently for everyone and fit means everything. I love my Scarpa Phantom Guide boots and am excited to go climb Liberty Ridge using these this June.