from what i did calc it's something like this:
+5Ras 4130(Normal), 4815(Crit)
+5Lara's 3783(Normal), 4787(Crit)
+Ras Hit harder but if you crit it's almost the same, you get 24 more crit rate with Lara's, so all in all i'd say they're pretty the same, if you already got +5 Ras and don't need another Gun, you don't need this, i missed Ras so i'm going for this
Thanks, +crit damage is pretty OP for Cloud, Auron, Tidus and Freddie type of units with high crit rate, but Ive already got a +5 ras algethi. I though this would be much better for Freddie, but I guess not, glad I'm not going to waste mats on it. Will prob do +5 Knights Armor and Galmia Coat 1st.