Don't think so based on the dimensions from this site: http://www.phonearena.com/phones/compare/Samsung-Galaxy-Ace-4,Samsung-Galaxy-S4/phones/8739,7597 It's a tight fit the ensure protection and the Ace 4 is slightly smaller.
By Barry Twomey on 15 December 2014
Otterbox are great with warranties. I have a whole new cash due to the silicon outer coming a bit loose. They shipped it to me free of charge within a couple of days of filling there warranty form in. Search otterbox warranty claim for the form.
By Dave Haggar on 20 October 2014
There are two little rubber stoppers. One for the charging socket and one for the headphone socket. I don't use headphones myself but find the charging socket easily accessible via the stopper, so I'm sure the headphone socket would be equally as easy to use.
By Ian Blackwell on 09 July 2014
I have the GT-19505 and it does fit, however do not trust the so called belt clip unless you intend using elastic bands or gluing it to the phone it is useless. I hope this helps.
By Andy Neave on 13 March 2014
Defender is the more robust one of the two. The defender comprises of a hard inner case with a built in screen protector and an outer silicon skin, whilst the commuter is a silicon and hard case single layer case and comes with a separate adhesive screen protector. I have the defender and can't fault it.
By Dave Haggar on 19 October 2014