Re: hand technique = strike technique
So, all these "techniques" can be broken down and grouped together in terms of the axis on which they are applied, and we can see that they are the same as the corresponding strikes. There is no difference.
Z axis: nikyo and yonkyo = shomen
Y axis: ikkyo, sankyo, and shihonage = yokomen
X axis: gote kaeshi, iriminage, and tenchinage = tsuki