Hard vs soft Aikido

I have been trying to compare the different styles of doing Aikido for years. Both styles can be very power full. The hard style which is a rougher form is more based upon techniques. The techniques are done very hard. There is little bending if any with the uke. I think it's a robot style. The soft style which is done with ki is more based upon bending with the uke. It can be very power full but much more grace full.

Hard and safe training....

It's important to train hard but it needs to be done safely. I have noticed some people can't find the tradeoff between the two. It's a tough subject to discuss.