Yes, unless your approach angle is flat, IE, the no-flaps with power, fly the C172 against the deck situation.
Still... comparing the landing of a 172 and Twin Otter is not a good comparison. The affect of the use of flaps between the two types is very different, and specifically trained during Twin Otter type training.
But neither type suggests an "against the deck..." type landing for the wheelplane. In all cases, the airplane should be flared to a landing. The Twin Otter ditching procedure specifies the use of full flaps, land as normal, and not to stall the plane.
The use of full flaps in a Twin Otter results in very different handling than a full flap 172. Depending upon how either type is wrongly flown to a runway landing, contact of the nosewheel before the mains is possible, and really bad!
As I have said, type specific operation is appropriate, and we should credit the crew with doing their best to fly the airplane using prescribed techniques for the type. Second guessing how they ditched the plane while comparing what they had to do with flying a 172 is not really relevant, nor useful.