M2 disk The latter can cause stutters on various systems (including mine)
I use a M.2 NVMe drive for games and do not have a issue with games stuttering (including FA).
Though not all m.2 drives are made equal, some are SATA where others are NVMe-based, cheap ones run slower and have different caching capabilities (which could be the cause of this stuttering).
Also in order to use Resizable BAR you need an M.2 NVMe drive for applications/games which support it.
For the best experience look for a good quality M.2 NVMe drive like the Samsung EVO or PRO.
However for Minimum specifications and if low cost is important any good quality SSD will be good, however also keep in mind like M.2 drives not all SSDs are made equal.