tlzma The .tlzma extension is an indication that file is archived as well as compressed. Generally, these are data files that have been archived by the TAR Archiver using the LZMA algorithm for compression. These files are smaller in size and can be decompressed faster in comparison to the other popularly used compression formats like GZIP and BZIP.
t7z The .7z filename extension is associated with the 7z compressed file archive format and the open source 7-zip compression utility both developed by Igor Pavlov. The format had its initial release in 1999. It consists of a start header 32 bytes in size which contains the signature and link to the ending header, followed by the compressed data, a metadata block, and finally the end header. 7z supports limited recovery options for 7z archive files which can open but for one reason or another cannot extract due to CRC or other data related errors.