Armasight Spark Core vs Spark-G

I’ve been thinking about getting a budget night vision monocular sometime in the future, and I’ve had my eyes on the Spark Core for about a year. However, today I came across the Spark-G model, but I can’t seem to find much information on it, other than it’s about $100+ more than the Spark Core. Anyone know what the difference between the two are?

As far as i can tell the spark g just comes with a head harness and mount