Neither of those is good for light gaming.
First of all, i3 processor goes right out the window.
Dell goes right out the window
Walmart goes right out the window
AMD E series goes right out the window.
I can see your budget is 400$, you will want the best bang for your buck, a good AMD APU is the best bang for your buck and comes with actual decent graphics.
http://www.staples.com/HP-Pavilion-15-N028US-15-inch-Laptop/product_275820?PID=5257136&storeId=10001&AID=10435034&SID=ShopAMD&cm_mmc=CJ-_-5257136-_-5257136-_-10435034&CID=AFF%3A5257136%3A5257136%3A10435034
6 gigs of ram, Ultra low voltage for long battery life laptop with actually decent graphics.
http://www.frys.com/product/7533316?site=sr:SEARCH:MAIN_RSLT_PG
Dual GPU variant, at 400$ thats actually an amazing price, its worth 650, id Really recommend you not waste a moment and buy it before its gone!