Both have the girl squad feeling that explores ups/downs, betrayals, affairs, and bonding with friends over a drink. The drinks are heavier and wilder in Sexy Central, and the affairs are more central in Fukigen na Kajitsu.
Similar feels of professional women trying to win at love and their careers, and sharing their joys/pain over drinks or dinner. Tokyo Tarareba is a bit more silly with comedic elements and is more focused on finding "the one".
