well we went and held both.... sig came out on top.
Hope it works out for you-I have both, but haven't shot 'em enough to give you much feedback. I got 'em for the dual purpose of saving on practice ammo and to start new shooters/kids on.
I agonized over the SIG for a while, but my research seemed to come up with the following:
1. Later models have been debugged (true or not, I can't say)
2. Folks seemed to have problems with the counterweight contacting the slide and causing slide breakage. Didn't bother me since I don't want/need the counterweight.
3. There was an upgrade to the magazines-you'll have to Google to find the particulars. Think you can tell if you have an upgrade by the magazine stamping, but I don't remember the particulars.
4. It amazes me how some folks complain 'bout ammo selection-either they didn't read the manual or it was updated after folks found problems? Mine came with a nice discount coupon for MiniMags, and the manual stated you should break it in with such.
A LOT of postings I read from folks that apparently read the manual on ammo recommendations seem to have little/no trouble with 'em. A lot of the complaints I read seemed to be from folks who just started off with the cheapest (low power?) ammo they could find.
From page 10 of the owner manual (download at SIG site):
Information:
The .22 LR ammunition spectrum ranges from very light loads for single loader guns to sport load, utility load and on through to high speed rounds. Unfortunately, however, it is not possible to adjust a semi-automatic gun to all loads.
We have therefore decided to make an adjustment to the loads that have priority for use with the MOSQUITO, which are the two major groups, utility and high-speed rounds. So to increase the round compatibility, we provide two slide springs for every pistol. The bigger bored version is designed for high-speed loads and is fitted in the pistol with delivery. The simple coiled smaller spring (marked white) is for standard loads and is supplied with the pistol.
Tip:
It has been proven that many types of utility rounds function more smoothly if the rounds are lightly oiled.
WARNING!
• Never oil high-speed rounds, as the pistol can unbolt too quickly while shooting.