Logos is a principle of divine reason which can be express in rhema. In John 1:1 The Word (Logos) refers to Jesus since there was no other flesh in John 1:14 that embodies this divine reason but Jesus.
Rhema are things spoken.
“It is the Spirit who gives life; the flesh profits nothing. The words (rhema) that I speak to you are spirit, and they are life.” John 6:63 NKJV
In any case, a divine reason need to be uttered or spoken.
Jesus in itself is the Logos or the divine reason and He expressed this by his rhema or from the things He spoke.
Overall, Jesus is both the divine reason and the expression of this divine reason. Or, Jesus is both the Logos and Rhema meaning, He is THE WORD and words.