I've read both faqs extensively as well as any other info i can find online but i'm still undecided.
Just making sure you're not one of those antis creeping/skulking/trolling around here asking about the coolest tactical non-res rifle etc etc.
A disclaimer, these are my experiences with my personal XCR, I have NO experience with the swiss arms, therefore; I am not going to say one or the other.
The AR mags were a big plus for me with the XCR,( i don't online shop often, only get to Calgary once and a while) plus the price point and the availability for caliber conversion. With all the rails on the rifle, also, I would not have to buy anything extra if I felt the need to tacticoolize.
I think a major point for the XCR not taking off in the U.S is not because they are inferior rifles or anything of the like, but merely they are a drop in a very large AR pond.
I have personally not had an function issue with my XCR, I love the easily adjustable gas block, the forward ejecting pattern and the trigger.
The LOP is a little short for me, but that is a design problem, not function, I also would feel better with a metal charging handle/ cover, not the plastic.
The disassembly process of the XCR is simple, one small pin, everything slides out. People will b*tch and complain about the loctite issue, I hit the bolts with it, took me maybe 15 minutes. That being said, I never rely on just torque/tightness to keep my rifles operating, all wear a touch of clear nail polish or 'tite somewhere. coat em, tighten, shoot, check. I like the idea of the swiss arms spring being ahead of the bolt, rather than behind. However, you do not need to remove that charging handle on the XCR to unlock the piston.
In terms of accuracy, with a falcon menace 4-14x44, off of bags, I was seeing 1.5 inch groups at 100 yards with 45 grain winchester "bulk" with gas setting on "4". Not always, but generally.the planets might be aligned those days, but I am confident with it.
One factor, you mentioned varmint shooting. the XCR is LOUD with the stock flash hider. Unless you have electronic earmuffs that amplify then cut off, it could be a problem.
I still look at swiss arms, thinking I should trade out the XCR for one once some more capital floats my way. then I get out a shoot it....
my 0.02,
i love my XCR,
is it the end all rifle? no.
are there better things out there? yes.
for the price? its a hell of a rifle for the price.
breakdowns? i've heard very good things about both wolverine and RA.
Would i recommend it? yes.