I wouldn't be surprised if the 70 weighs about the same as the 60 or 50. Most manufacturers design their range in groups, i.e., 30/40/50, 60/70/90,.... where the engine is same but with different tuning/detuning.
The boat difinitely looks good. Being a warrior and I don't doubt it will preform as such. What I really like is the way the writer used the word 'serious anglers' serveral times implying thisboat is for them.....