Here is what I found from web:
What is the difference between Elie Tahari and Tahari Arthur S. Levine? How are they related to Anne Klein, Jones NY, Kasper, LeSuit and Nipon suits?
Elie Tahari is designer who has built a $500 milliion dollar business over the past 3 decades. According to his website, he "believes clothing should be 'quieter than the woman,' so that her true beauty can shine through." He rose through the adversity of being raised in an Israeli orphanage by moving to New York and becoming a respected designer while in his 20's.
Elie Tahari now offers separates: tops, jackets, pants, denim, dresses, skirts and shoes. Dress retail prices range from $348 to $598. Jackets start from $398 to $1598. Bloomingdales, Nieman Marcus and Saks Fifth Avenue carry the line.
Elie Tahari licensed his name to the Chairman and Chief Executive Officer of Kasper, Arthur S. Levine. The new brand became Tahari by Arthur S. Levine and retails from $290 to $340.
Jones Apparel Group now owns the Kasper, Le Suit, Anne Klein and Nipon brands in addition to their own Jones NY brand. However Tahari ASL is not identified as a Jones brand on their website. But through my handling of all of these suits, it is clear that they are manufactured by the same factories and are distributed through the same channels.
So Elie Tahari is designer line intended for the "sexy, sophisticated woman" and Tahari ASL suits are designed for high end professionals such as lawyers, professors and corporate personnel.