There ARE RCs who have had a real Salvation experience, by watching TV or even listening to an evangelist on the radio. Years ago, an old Baptist evangelist from South Carolina, Oliver Greene, spoke on this subject on the radio. I’ll never forget one of the things he said, “You ought to see my mail. The Pope doesn’t have all of them.” Obviously meaning that RC listeners had accepted Christ as their Savior and then wrote and told Greene about it.
What is the difference between a "salvation experience" and the LDS "burning in the bosom?"
Yes. I do know some who are truly saved.