Quick answer. Use Army 2 because unless I'm missing something Army 1 is only 1222 points.
Longer answer. Either list looks weak in the tank-busting department. At 1500 points seeing multiple Land Raider lists is very likely. I would suggest Heavy Destroyers. Tomb Spyders, a Lord with a warscyth or a C'Tan can mangle AV pretty good as well, but lack the mobility of the Heavy Destroyers. And of course a Monolith (or two at the very most) at the 1500 point level is an option. In 5th edition, mobility is king… and as Sun Tzu said, “Rapidity is the essence of war.”