Take the new one. Those
BWP "packs" contain patches to
- avoid stops during install (displaying readmes and so on) (Installpack)
- fix errors (Fixpack)
- add translations (Textpack)
- get rid of some overhead (Trimpack)
Last one means that you don't run
weidu -biff numerous times but try to let gen_biff do the work once at the end. That way, modified versions are not scrambled in your overrideand several biff-archives.
Lol is famous for obsessive usage of smilies and he added some modified version for each
BWP-version and called them Borkpack since you might end up seriously borking (hurting) the install if things would have been wrong somewhere in the process.