Isnt the LTCL meant to be the trinity equivalent of LRSM?? If so doesnt that mean that that the Op15 No1 is a similar standard as The ballaeds which are on the LRSM Syllabus.
1) Yes, LTCL is supposed to be the Trinity and Guildhall equivalent of LRSM. Although there seem to be people who think that LRSM is more prestigious and of a higher level. I have also seen people wrote otherwise. I don't really have an opinion on this as I have neither qualification. This is probably all a bit of rilvary between the conservatoires.
Interestingly, according to ABRSM's requirements, in order to take the LRSM exam, you must have a DipABRSM or an LTCL (i.e., an ATCL is not enough). This seems to suggest that ABRSM regards LTCL, and not ATCL as the equivalent of DipABRSM.
2) Yes, that's true theoretically. However, I tend to think the Ballades would be more difficult than Op15 No1. For one thing, they are more substantial works. I think the Ballades (except the third one, which is considered the least difficult) are in the LTCL syllabus as well.