ChrisMoses

This is the short version, I'm leaving out a lot, if we ever hook-up I'd be glad to expand on it. For clarity, let's talk about a left hand shomenuchi attack from uke. The most obvious external differences would be the placement of nage's right hand behind/under the deltoid instead at the elbow, and then the blocking of uke's left hip with our right hip (almost in position for uchi mata). Other differences would be the way we enter, amount (or lack) of blending, straighter lines of movement, and which muscle groups are being used to transmit force and stabilize the body, but that quickly gets too complicated to talk about online. When I still did Aikido, if I did this version in class, the instructors would frequently try and correct how uke was taking ukemi because if you do it right their feet 'feel' stuck to the ground and it looks like they're not moving enough. What I was doing looked similar enough they often mistook it for something uke was doing wrong to make them fall and move awkwardly, but it wasn't. I'd usually back off so that they could go back to falling normally. Hopefully that gives you at least an idea.