There are a couple differences in 422’s. The fixed rear sight pistol is less desirable than the adjustable sight. I think the style of grips you got may have been paired with the sight.
The magazines have a nuance that should be mentioned. The earlier guns came with 12-round magazines identified easily by the orange follower. Later guns were 10-round limited, but both magazines do cross with the Model 41.
The 422 is a neat and fun gun — the finish is NOT durable and the price often hinges on the condition of that finish.
The 4-inch gun is probably less sought after than the 6-inch… it’s pretty homely.