The road Keo pedals are lighter than SPD’s if your gram counting.
There are also 3 different colours of cleat which have different realease presssure.
On balance I’d probably prefer to swap my Time ATAC carbon/ titanium jobbies onto my road bike and walk normally when I stop. I do find especially new road cleats more trouble in and out. Being plastic they seem to wear pretty quick.
I have a difficult busy junction to get accross and clip in time was/ is an issue.
I find it’s worth practicing pedaling one legged for 5-10 meters. Basically at the junction, one foot out for balance and one foot clipped in. After you push off, don’t mess with trying to clip and being stalled on the road junction, just let the foot rest on the pedal and use you clipped in foot all the way round up around down in a circle to keep riding one legged till your accross the junctions and out of trouble then clip in the second foot.