Pletter is a compression package to compress data on pc to use it on MSX. Pletter is a somewhat improved Bitbuster.
Of course the files will be a bit smaller with Pletter, otherwise there would not be much use for it... Here is why using pletter will result in smaller files:
Pletter will also compress and decompress faster.
Pletter version 0.5c has an option to include the original size in the packed data. If you use this, you have to update the unpacker.
Pletter 0.5c1 - pletter.exe for PC, unpack.asm for MSX, pletter.cpp for laughs.
Pletter 0.4a - The old one, smaller de-compressor and you can decide on the look back buffer size yourself - pletter.exe for PC, unpack.asm for MSX, pletter.cpp for laughs.
Pletter0.5 is not compatible with earlier versions.