Stanley,basically the same gun,the RX/RX-1/RX-2/HW90....The lamiate stock on the RX-2 is obviously the most noticible,it is also abit more than a pound heavier,I had three of the four,the RX-1 is by far the better of all four,it has a two-stage adjustable trigger(awesome trigger)my RX- 1 shoots Beeman FTS 11.7gr 935fps like a laser,the .20 is hard to find...I got lucky!