I think Azmat may have longer range, but other than the addition of a 23mm automatic gun, it carries the same armaments and is larger by 2X. Additionally it is slightly slower to be sure (30kn vs 36kn) but im not sure that it is more expensive. The one major interesting thing though about Type 022 is that it is meant to operate with other Type 022 in group fashion. That will give it decent air protection given the main gun of the Type 022 is the AK630 CIWS (which Azmat also has, but in Type 022, it is on the front). With 5 or 6 Type 022 you would be able to create a wall of anti-air/anti-missile fire with numerous CIWS being brought to bear on few targets at 5km ranges. Additionally Type 022 can carry the HN-2 LACM (1800km range) which means theoretically it could be fitted to fire Babur LACM (which it really would not be useful for given PN's current capabilities) or, more importantly, be fitted to fire Zarb AShM (which is the 300km new Land based AShM for PN, likely a varient of C-602 missile) which gives it huge utility. With the advanced datalinks reported to be on the Type 022, the long range missile like Zarb, the Type 022 could fire from 250-300km away from the target and the missile would theoretically be guided by AWE&C like ZDK-03 Karakoram Eagle while the FAC speeds the heck out of the theater of battle. Given the small size and stealthy design of the Type-022, it would be well out of the range of return fire or even detection from IN or other intruders before it could fire off missiles like the Zarb and scoot back out to safety.