I LOVE tea and drink a lot of it!
If they are by the same company, and have the same ingredients, I would assume the only difference is that they've bagged one and not the other! Some people have their own tea-ball (a little round ball you seal the loose leaves in, and drop into your mug), or tea steeping process at home (usually a mesh container dipped in hot water), and if they are the same quality ingredients it shouldn't matter whether it comes pre-bagged or not
I use both tea bags and loose leaf tea. I do find the loose leaf tends to be higher quality tea and you get more tea for your $$.
I love blending teas together, a green tea with a fruity tea is nice