financially it makes no difference, you will get paid the same. the security clearance is comparable, depending on billet and will be the most use afterward
every CTI I know HATES their job. it is long tedious hours spent in windowless rooms with headphones on transcribing
CTNs NEVER deploy and will never go OCONUS. you are limited to about 3 or 4 duty stations total. it too is tedious with long hours spent hacking and preventing hackers from doing their thing. it is also fairly new so no one is really sure what the career prospects are yet, in or out of the military.