Your bike is a K75 Sport, correct? Was that offered with a low-seat option and does yours have it?
Yes, it's an "S" with the standard "S" weird, welded bar. I have a comfort seat on mine, it's a great for longer days, and my wife says the pillion is spacious and comfy.
I've test ridden a low seat K, just a short distance. This was a potential buyers ride for 10-15 mins around the neighborhood. It was noticeably easier to flat foot, although I ended up getting the brick with the comfort seat and just slide a cheek to the seat edge if needed in wind or an off-camber road. Once moving there's little to notice in seating, except the low seat option is easier to shift around on.
As far as seat comparison's, it's really odd, but I felt super confident on an XT600 with aftermarket springs and 34" seat height, and never felt secure and solid on a CB750F which is about 31". Riding with dirt riding gear and boots probably had a lot to do with it.