Originally Posted by Lied

The wiki has the max level stats of the +10 equipment in parenthesis
http://harem-battle.club/wiki/Flower.../FKG:Equipment

The character specific equipment so far is all earrings, so they'll be better than normal earrings and give both ATK and DEF, but they give a lot less than the rings/bracelets (since they're still just earrings).

EDIT: Also, higher rarity equipment takes more exp to level and leveling equipment ends up getting expensive at higher levels, so that's something else to keep in mind.

Funny to see that leveling the Attack ones just gives ~50% Boost, while the Def ones get ~100% or more boost.