Why the difference in neofetch and free (RAM) output?

wadewayne@Cheetah:~$ neofetch MMMMMMMMMMMMMMMMMMMMMMMMMmds+. wadewayne@Cheetah MMm----::-://////////////oymNMd+` ----------------- MMd /++ -sNMd: OS: Linux Mint 19.3 Tricia x86_64 MMNso/ dMM .::-. .-::.` .hMN: Host: Inspiron 15-3567 ddddMMh dMM :hNMNMNhNMNMNh: `NMm Kernel: 5.4.0-77-generic NMm dMM .NMN/-+MMM+-/NMN` dMM Uptime: 9 mins NMm dMM -MMm `MMM dMM. dMM Packages: 3130 NMm dMM -MMm `MMM dMM. dMM Shell: bash 4.4.20 NMm dMM .mmd `mmm yMM. dMM Resolution: 1366x768 NMm dMM .. ... ydm. dMM WM: i3 hMM- +MMd/-------...-:sdds dMM Theme: Arc-Dark [GTK2/3] -NMm- :hNMNNNmdddddddddy/` dMM Icons: Pop [GTK2/3] -dMNs-`-::::-------.` dMM Terminal: terminator `/dMNmy+/:-------------:/yMMM CPU: Intel i3-6006U (4) @ 2.000GHz ./ydNMMMMMMMMMMMMMMMMMMMMM GPU: Intel HD Graphics 520 .MMMMMMMMMMMMMMMMMMM Memory: 367MiB / 3801MiB wadewayne@Cheetah:~$ free -h total used free shared buff/cache available Mem: 3.7G 325M 2.3G 39M 1.1G 3.1G Swap: 521M 0B 521M Hi. I don't understand why neofetch and free -h output different result for RAM usage. Which one's more accurate?