Originally Posted by
Anduril
The stats on Schvelle are:
S/R/T-DEF 394
HP +100
PP +12
S/R/T-Resist +5%
S/R/T-ATK +50
while those on Novelle are:
S/R/T-DEF 427
HP +180
PP +3
S/R/T-Resist +4%
S/R/T-ATK +40
Without taking into consideration upgrading your Novelle into Liberte (which I don't think we know the stats for at this moment), the choice comes down to the old HP v PP.
While considering the upgrade, Schvelle is now a dead-end set that will likely still last you a good while until we get significantly better 13* units, and Liberte stats will more than likely have more ATK and HP, though I doubt the PP will be as high as Scvelle, unless they pull a Zenesis/Qliphad with that upgrade.