Ace 3 is on 4g and s3 mini is not but s3 mini still has got some things better than the ace. I have checked reviews from many website and they were rated the same as s3 mini has got a few more better things on it but the ace is 4g. People have had ace 3 say it is better than s3 mini and say you should buy ace 3 instead but s3 mini is more well known and that.
What do you think. Price wise ace 3 is slightly expensive but I don't mind about that.
Added (1). Looking for a back up phone.
Read more: Samsung Galaxy s3 mini or Ace 3?