Its reasonable compared to Stefano Turr. Similar size, power and speed. Just trading torpedoes for 25mm guns. Having torpedoes gives more options, more likely for China to encounter larger ships than to be fighting MTBs. The Fiat diesels used were unreliable and underpowered compared to the petrol engines used in other MAS. Also, only 1000 more hp for a boat 3 times larger so speed suffered.
Mas Stefano Turr
Characteristics:
Displacement 58t standard, 61.6t normal, 68.5t full load
Dimensions 32.0m x 5.95m x 1.32m (just 0.95m according to Conway's)
Engines 4x Fiat V1616 Diesels, 4x 750hp
Speed 34kts project, 30-32kts real
Range 750nm/25kts - 1,582nm/16.6kts
Fuel 10t normal, 16t full load
Crew 16
Armament 4x 450mm torpedoes, 2-3x 13.2mm MG, 1x 6.5mm MG, 12x ASW bombs
http://forum.axishistory.com/files/turr_180.jpeg