UKC

Hello, I was looking for some advise regarding the above boots. I am looking at getting some new/ 2nd hand boots for my partner for Scottish winter munros and hopefully a guided ascent of Mont Blanc via the gouter route in the summer. She suffers from cold extremities so I thought the phantom could be a good option. Even though there are discontinued you can get new unworn pairs on eBay for less than the Mont blanc pro. However there are obviously none in the shops to try on. Does anyone know if they would be the same fit as the mont blanc pro? As we have tried these on in the shop. Looking for suggestions on which is the better boot and also what shops have a good selection of Winter boots? Tiso has a very limited choice. Thanks.