They will be similar in performance.
The sound curves will be a little different.
I used the Kohler for my master bath for a while, and didn't like flushing it at night. The Flushmate seal would sometimes leak, so I would turn off the wall supply until the morning.
Having used both, the Toto Drake is more homeowner friendly.
I like the Sanagloss bowls.
The Toto Gwyneth may be a good option too.
Drake 800 grams by Veritech Video