but intrested to know the difference
At first glance, about 12,159 lines.....
$ wc -l File1.txt
8714 File1.txt
$ wc -l File2.txt
20873 File2.txt
Removing everything apart from basic printable characters.....
$tr -cd '\40-\126' < File2.txt > filex.txt
$ ls -ltrh File2.txt filex.txt
-rw-r--r--@ 1 * * 565K 28 Jun 11:04 File2.txt
-rw-r--r-- 1 * * 524K 28 Jun 11:11 filex.txt
So you've just got a bigger text file. Nothing sinister hidden.