With PTC, you are guaranteed employment on successful completion of the course and seems to be the only course running, as FTE's course has just closed for entries.
Do you believe everything that you are told? I hope to god you do some detailed research and corroborate that statement before you go and spend a huge wedge of cash on a hope and whim. Perhaps ask them for a copy of the contract and have a lawyer review the "guarantee" clause you are referring to.
You would be more likely to get a job with CTC, however, you had better be at the top of your game to get through the selection process. Even after all of that the best you could hope for in the current climate is a summer contract building some hours. The hold pool is getting larger by the month so you could be swimming for years at the current rate. Factor that into your costings for your bank. Also go and read the various CTC threads to see what is going on in the job market and how bleak it is.