+1001 for trying them on.
I have narrow feet and get on great with 5.10 and Scarpas, but the heel cup on Boreals is too wide for me so no good for heel hooking.
You really cannot rely on other peoples recommendations for styles, only on their recommendations for performance and quality.
If you are quite new to the sport it's probably best to go for something with a firmer sole to give your foot some support – until your feet get used to the pressure on them a soft sole with little support isn't going to do you a lot of good and also they'll wear out that much quicker.
Consider looking in Decathlon – apparently their shoes are not bad for beginners.
And don't assume if a size 40 (for example) in a 5.10 shoe fits you, a size 40 Scarpa will – they're so variale.
Good luck.