In reply to Rick Ashton:
What I can say is that I've worn La Sportivas happily for years and in the days of traditional boots Scarpas too. However, every time I've bought Scarpas in the last 15 or more years they have been a total and utter disaster. Heel lift, having to buy too big a size which is due to them being narrow across the broader part of the foot for me.
I'm sure they are great boots but I've been tempted into wasting hundreds of pounds on them because, in the end, they are not, for me, foot shaped. They used to be, and I have only one pair of traditional broad Scarpas looking very like the old guida (3.5 lb weight per boot!) bought new in Switzerland in 2003 which still are foot shaped.
The problems for me arrived with the much vaunted "RS" last and since then none of their boots has done anything for me but make me poorer and wounded in the feet despite their tempting advertising and displays.
So yes, fit and sizing vary a lot!
Post edited at 15:38