+xThe parts have less resin than wetlay so you are not ripping through so much resin when you try to delaminate - remember at this point the material has already failed, so you are just ripping apart the resin, of which there is slightly less.
In terms of "easier to break" , In a scientific approach rather than hammer whacking, I would expect slightly better performance with a resin infused part as the fibres are generally better consolidated and compressed tightly together. That assumes all other variables are equal.
Thanks for the explanation. I am using the hammer approach to test how my autonomous boat will handle impacts (e.g. rocks, icebergs, shark teeth). I realized I should use a thicker Kevlar as the outer layer.