Both maxed....let's compare corala guitar +9, java guitar +9, and valkyrie guitar +11 (you did say both maxed, after all).
Corala Guitar +9: **LEVEL REQUIREMENT 185**
Javawalk Guitar +9: **LEVEL REQUIREMENT 170**
- Magic +40 &
- Activation Effect: Magic Explosion (or whatever; increases magic damage for a short period of time)
Valkyrie Guitar +11: **LEVEL REQUIREMENT 125**
- Water +15
- Magic Min. Damage +20%
- Targets' Magic Defense -15%
- Magic Critical Damage +30%
- Valhalla 4th FX (Flaming Wheels of AWESOME)
I still am below 100m. Lols.