KARA ended ATEEZ with ease and here is the proof!
There will be different categories! - Album Sales, Single Sales, Single Charts, Tours

Let's start off with album sales!
KARA:
Super Girl - 778k
Girl's Talk - 500k+
Girls Forever - 250k+

ATEEZ:
Zero: Fever Part 2 - 391k
Zero: Fever Part 1 - 390k
Treasure Epilogue: Action to Answer - 186k

In Conclusion, ATEEZ despite being a boygroup, sells way less than KARA.

Moving on to single sales!
KARA:
Mr - 6,295,000
Jumping - 3,463,272
Lupin - 3,077,898
STEP - 2,811,221

ATEEZ:
Answer - 1,000
Inception - 1,000

(ATEEZ singles are not displayed because they are too low so I can only access their US sales which are solely from streams).

Moving on to Singles Charting History! [GAON]
KARA:
Lupin - 1
Step - 2
Pandora - 2
Jumping - 3
Damaged Lady - 4

ATEEZ:
Fireworks - 148
Answer - OUT
Inception - OUT
Wonderland - OUT
Thanxx - OUT
Wave - OUT

ATEEZ has a total of ONE song that has entered the top 200.

Let's move on to tours!
KARASIA 1st Concert :
218,000 Attendance (100% Sold out)
Total Revenue of $27,328,400

A DVD and Blu-Ray was also released and topped the Oricon Weekly Chart [60k sales]

KARASIA 2nd Concert
141,017 Attendance (99% Sold out)
Total Revenue of $20,066,687

ATEEZ has hosted a world tour, yet revenue and attendance is not available, but it is highly likely the success of KARASIA has out-performed and out-revenued 'The Expedition Tour' "

Let's also compare talent! Here is ATEEZ's "main vocal" Jongho, screaming a flat and pitchy 'high note'

Here we have KARA's lead vocal Gyuri, producing a resonant and beautiful compilation of high notes that she can sustain with ease!

Here we have Jongho again screaming and butchering Miss A's 'Goodbye Baby' where he is flat and inconsistent

And finally, we have Gyuri's beautiful medley of her parts on KARA's Full Bloom album!