I am lvl 54 (play as "THE EVIL ONE") and still have loadouts for each. The anova is definitely one of my favorite guns. The anova hits significantly harder than the terralite in most situations - even with HH on the terra. There's no doubt that the anova gives more head shots, and for me, it is also easier to hip-fire with, making it a potent close quarters combat weapon. However, the terralite is more accurate from distance, and more effective silenced. Anything outside "average" kill distance is the anova's weakness. Until you unlock the strata, I would stick with the terralite for larger maps, and waste people with the anova on smaller maps. Another good thing about the anova is that it really doesn't need HH, so you can equip LF instead. Don't get me wrong - the terra is a quality weapon that I used for a long time, but the anova is just more effective for me... You should use whatever racks up the most kills for you.