I hope you got my humor about going shopping. But I really have no idea about anything having to do with Theoben, I just collect them. Only kidding, see below.
The break barrel is a Sirocco Deluxe .177, the 2 underlevers are both Dual Magnums, the lighter colored one is a Beeman marked "Dualie" and the Darker is Theoben marked. They are identical in form, function, performance, etc other than the marking and color. They are the most powerful non custom piston ever produced making 36fpe and be cocked and fired at 2 different power levels by cocking one or 2 times hence the "Dual" portion of the name.