Same for me second time around. My first was Sig was way earlier model, like one of the earliest based on the serial "that I could tell".
Now at that time I was gigging, recording, and rehearsing heavily i.e. we were either on the road, rehearsing or recording over about a two year stretch. My chops had never been better and my amp choice came down between the Sig and a JVM. It was close but I went with the JVM and have been with that amp since. However that Sig just seemed to have more gain because it was right there with the JVM. Basically it was the Marshall mids that won out, not the amount of gain.
Tracked down another Sig a few years ago and frankly it needed a boost to get the gain where I liked. More than likely it was me that changed as I doubt there was anymore gain in that initial run. Probably just where I was at that point as a player but yeah now, it's close but the Sig to me "at this point" needs some help.