The CS Master Hunter and the F1 might look the same but the steel is different. The MH has something called VG1 San Mai III and the F1 has laminated VG10, where the VG10 sits in the middle and some softer steel on the outside.
The MH has flat grind and the F1 konvex grind (a bit more advanced but still easy to keep in shape, abrasive paper and mouse pad) with more steel in the blade.
If you look at it marketing wise, there are big differences in approach on their respective homepage. You know what I mean. One is "american" in approach with ho-ha-defence-kill-ho-ha the other is more well "swedish" with pictures of moosehunting, Peters grandchild and other things.
What I have heard about CS is that lots of knives has broken, or maybe its just because the fuss with CS and Strider.
Anyway. You also buy an image. When you buy a CS you do your part in the "war on terror" etc. When you buy a Fallkniven knife its more like wiking heritage, red cabins with white corners (like the banner on knifeworks), calm and peaceful walks in the forest and so on. Even though the F1 was initially developed as a pilot survival knife (like the Ontario JPSK) it does look like something a regular hunter would bring in the forest and as such it has become very popular in the bushcraft community as well as in many military units (young homeguard soldiers tend to buy BIG knives to look macho but later change to F1 after some time

).
I used one while in Bosnia and I know of some US soldiers using it in sandland.
When you get your F1, get some different sheaths as well.
*The now discontinued kydex is best for combat type jobs, taped to combat wests and such since it holds the knife upside down.
*The open leather is traditional scandinavian way to carry it.
*The closed leather looks fancy and is nice if you dont use the knife often. You just tuck the flap inside the belt when you want it out of the way.
*The new zytel sheath is extremely good for hunting and other messy jobs since you can put the sheath in the washing machine afterwards. Its the main sheath shipped with all knives nowadays. I have attached a firesteel on mine and it works great.
*The airforce sheath (only issued to airforce crews) looks like a mix between cheap mora sheaths and the zytel but has no locking strap.
Usually people carry the F1 crossdraw with the open leather sheath, like old times or the more popular neck sheath (easily made by converting the open sheath).