Lumia 720 vs 820

Hi all,

I want to buy lumia 720. But the lumia 820 has 1GB RAM. As far as i know, the biggest difference is the RAM. But the 720 has better camera, especially the front 1.3mp compared to vga of 820 and low-light capabilities of 6.7MP rear (which is as good as 920.) The price and the camera makes me wanna go for 720 but the 1gb ram in 820 makes me think twice. I know i will miss out on some games with 512MB ram of 720 but will it get to a point where i regret going for 720? I am planning on using this for another 1.5 years so please suggest.