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 Generally, these are data files that have been archived by the TAR Archiver using the LZMA algorithm for compression.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.
txz The TXZ file extension is typically found in archive files which are created using a combination of TAR and the XZ utilities. TXZ files contain multiple files which are first archived using Tar and later compressed using the technology of XZ compression. TXZ files are known to be smaller in comparison to TGZ files. From a more basic perspective, XZ utilities compress TAR archive files just like how GZ utilities compress various TAR archives, the only difference being in the compression ratios and the resulting file sizes after compression.