LG Optimus L9 has a bigger screen so I would say go with LG but LG's screen is IPS LCD where Galaxy S3 Mini has Super AMOLED screen also LG's resolution is higher 540x960 vs the s3 mini 480x800. Pixel density is 234 ppi on LG and 233 ppi on S3 mini. Game wise both have the same games as they both run on android. So I would say go with LG because its bigger and would be better for gaming but I would say s3 mini is little bit better quality wise. Here is a comparison you can check it out http/www.phonearena.com/phones/compare/LG-Optimus-L9,Samsung-Galaxy-S-III-mini/phones/7459,7536
LG Optimus L9 has a bigger screen so I would say go with LG but LG's screen is IPS LCD where Galaxy S3 Mini has Super AMOLED screen also LG's resolution is higher 540x960 vs the s3 mini 480x800. Pixel density is 234 ppi on LG and 233 ppi on S3 mini. Game wise both have the same games as they both run on android. So I would say go with LG because its bigger and would be better for gaming but I would say s3 mini is little bit better quality wise. Here is a comparison you can check it out http/www.phonearena.com/phones/compare/LG-Optimus-L9,Samsung-Galaxy-S-III-mini/phones/7459,7536