there is really no such thing as which is harder or easier. Since i only did texts, it's hard to comment on RnS.
If you're the person who likes literature, english and history--then TnT is good for that. It's almost like text response in english...in a nutshell....You study a section of the bible and study, study, study it! I found i really enjoyed texts because of the understanding it gave you--not just in the religious context, but how writers and authors wrote stories the way they did, why they wrote it in a certain way etc. I'm not catholic or anything, but i studied Luke, and i really enjoyed studying how that story came to be the way it was.
As for RnS...some of my friends just say it's all about bullshitting for way through it

Know your ethics/ morals or soemthing like and and just formulate responses to scenarios.
If you wanna learn relgion, go for it. But if i were you, i'd go for uni-chem

But then again, depends what you wanna do in the future, your likes and your skills
