I have only tried the N80, GTX, Arthur Asia, Arthur Europe and T3.
The Asia was too hard for me, and I'm used to the H3 41 deg
The Europe was kind of nice on forehand, but you have to put in a lot of power to get it working, looping.
The T3 is the fastest, but I had difficulties producing enough spin, so this one ended up on my backhand.
GTX is the one closest to Euro/Jap rubbers. Quite bouncy, not so much for brushing. Good for attacking game.
N80 feels like the one closest to my H3N, but not quite that deadly brush looping wich H3N gives you, but almost. The nicest thing about this one is when blocking, it gives you a softer feeling than H3N, and you can land more balls on the table. This one gives you the best spin of all the LOKI rubbers I've tried. Works for me on both forehand and backhand. Most of the LOKI rubbers above are quite heavy. Weight cut to a normal blade: GTX=48g, N80=50g, T3=53g, Arthur Asia=54g and Arthur Europe=55g.
I haven't tried any Rxton rubbers, but I understand that they are good compared to the price.