Well said Overt
225: float arming speed 150kts, can (should!) inflate before ditching, certified to sea state 6 as standard, unlikely to require to ditch (30 mins dry run time).
S92: float arming 85kts(?), cannot inflate before ditching, sea state 4 as standard, only 6 with optional extra bags (which were not available for early deliveries), more likely to require ditching (no dry run time with dodgy crack-prone gearbox)
Take your pick.
HC