Yes and no. I haven't played this particular entry yet, but I have read up on a few things about it. It's core design is an advancement over Romancing SaGa 3 where you get to pick one of eight characters to start the game with. The core differences here is that SF1 keeps the plot focused on that character's personal story whereas in RS3, the opening plot of the character is basically a nice get to know them experience before the character swan dives into the overarching plot that all eight protagonists will finish at. So in SF1 every character has their own unique final boss that is connected to their starting story. The in-between portions has all the character exploring the same world and meeting many of the same characters you can recruit so that stays as well.

Where is it like the GB entries is that it brings back Robots and Monsters in a big way and the Esper race gets a major retool if we want to count Asellus as one. They also bring back multiple development mechanics back. So like Robots can trade in their bodies for stronger ones, Monsters can absorb defeated enemies to morph into stronger forms, and most of the cast have some little gimmick to their playstyle or scenario to make them all feel unique from each other. The graphics, music and interface also give the game a funky FFVII/SO2 vibe, but that's just a personal observation.

I plan on checking it out once I finish one of my two RS playthroughs.