Really?
Both have 76mm main gun, ASW rockets and ASW torpedoes.
Both have same AShM, but Kyan Sittha has 2x4 verses 056 with 2x2
056 has 2 single 30mm canno versus Kyan Sittha's 3x 30mm gatling and 2x 14.5mm gatling.
056 has only a helicopter pad, while Kyan Sittha has that plus a hangar (i.e. organic heli)
More/Better sensors on Kyan Sittha
So, NO advantage for the corvette here
So, it is just that 056 has 1x 8-round FL3000N versus Kyan Sittha's 1x6 Pedestal mounted manpads.
FL-3000N missile:
- Minimum range: < 500 meters
- Maximum range: > 9 km for subsonic targets, > 6 km for supersonic targets
North Korean HT-16PGJ MANPADS
- consistently identified as the similar Soviet Igla-1E (SA-16 [9M313])
- operational range 5.6 km (3.2 mi)
That, my dear, is not a huge advantage....
And Myanmar also has it's own corvette, which is not much less from Kyan Sittha and smaller than 056 (yet very much it's equal): 76mm gun, 2x 30mm gatling, 2x2 AShM C802, 1x sixtuple manpads launcher, 2 ASW rocket launchers, helipad and hangar
http://www.janes.com/article/66579/myanmar-navy-commissions-first-corvette-with-reduced-rcs
I like both these designs in service with the Myanmar navy, which are nice all round designs. Personally, as far as aesthetics is concerned, I think the 056 - with it's low bridge and disproportionally large SAM launcher - is fugly. But you can't account for taste (or the lack thereof on my part ;-)