You cannot compare solar grenades to void grenades. You also cannot compare two grenades at all times from an armour perk to two grenades that require you to use one subclass (which happens to be the support class and least useful for solo play and DPS). Armour is seriously imbalanced between classes. Certain items for some classes have no counterpart for other classes, leaving the game markedly unbalanced overall. This is indisputable. The stats for all gear is freely available to compare. The classes are balanced, apart from armour.