He said from mid-nineties, so to make it easier, thats when Wenger took over and started implementing his style.
Arsenal: 3 PL titles, 5 FA Cups, 4 Community Shields
L'Pool: 2 FA Cups, 3 League Cups, 1 Champions League
More importantly though is the football that they played back then, as well as the Invincibles. There is no question that Arsenal were miles ahead of Liverpool both in terms of popularity and success. Also this is not meant as a dig but when I was looking at club honours I couldn't resist a chuckle when looking at Liverpools title wins actually date back to over a century ago.