No, while they have similar settings and some sharing of rules, they are two different systems with two different ways of play.
Naiteborne is more focused on the one character in a party of heroes and flows more similar like campaigns of D&D5e, PF2e and similar.
Together is the Guild is more focused on the concept of Guilds (Crews), and plays more similarly to games like Blades in The Dark and Scum & Villany.