No, the X-king Contis come up narrow as well, and it depends of the exact version you get:
X-King Racesport 2.4 29er – 2.310″ wide, 2.225″ high (from rim edge)
X-King Protection 2.4 29er – 2.205″ wide, 2.137″ high (from rim edge).
Mountain King II Protection 2.4 29er – 2.275″ wide, 2.228″ (from rim edge).
All latest versions, all measured by myself.
I’d say 2,4 is too much for an XC/allround tire. Adds quite a bit of unnecessary weight as well.
60 grams extra wight per tyre. I prefer the extra volume and grip.
If I needed something more grippy for the front I’d look at either MK or RQ/TK.
MK is 100 grams more per tyre. TK is 300 grams more per tyre. And both are slower rolling than the XK. However, I wouldn’t recommend the XK for this weather, better MK for general use IMHO this time of year.