What TSV is
TSV is CSV with tabs instead of commas. Because tabs almost never appear inside a value, quoting is rarely needed and the files are easier to read by eye.
Bioinformatics, log processing, and anyone who has copied a block of cells out of a spreadsheet: the clipboard format is TSV.
What LaTeX is
A LaTeX table is a tabular environment: a column specification, ampersands between cells and double backslashes at the end of each row.
Academic papers, theses and anything typeset with LaTeX or written in Overleaf.
What changes when you convert TSV to LaTeX
The tab is unambiguous, so there is no delimiter to guess. This is the most reliable of the delimited formats to read.
Rules are drawn with booktabs by default, which is what most journal templates expect. The characters LaTeX treats as special, & % $ # _ { }, are escaped so a value like 50% compiles instead of ending the line.
What carries over from TSV to LaTeX
TSV records 2 things about a table that LaTeX has no way to hold.
LaTeX marks its header cells differently from its data cells, so the first row is written with that marker.
TSV can be read one record at a time. LaTeX has to be complete before it means anything, so the whole table is held in memory while it is written and a file that gets cut off part way through is not partly usable - it is unusable.
LaTeX is the end of the line for this data. Reading the table back out of it is a separate and much harder problem than writing it, so keep the TSV if you will need the values again.
The identifier 007 comes out of the LaTeX as 007. Reading it as a number would have made it 7, and an id that changes value is worse than one that stays text.
The role "Analyst, data" survives with its comma, in one cell rather than split across two. That is the first thing to check in any converted table, and the usual place a LaTeX file goes wrong.
The quotes around Jonah "Jo" Pryce are left as a plain quote character in the LaTeX.