This is Xbox Live's Games With Gold, Vs PlayStation's PS Plus EU, on which has given you the best FREE games in October 2013 on Xbox 360 & PS3
As a note, PS Plus Vita games don't count as this is just Xbox 360 Vs PS3.
Ok we are going to look at the value, looking at all games and how much they would cost without the service of Gold and PS Plus as a download and as new on disc.
Ok so in October 2013, Xbox Live Games With Gold gave you, Might & Magic Clash of Heroes and Halo 3
PlayStation's PS Plus EU gives you, Far Cry 3, Giana Sisters: Twisted Dreams and Dragons Dogma: Dark Arisen
First lets go with Games with Gold,
Might & Magic Clash of Heroes, Download cost is £9.99
Halo 3, Download cost is £14.99 and the best New retail cost at the time of this is £10.90, so we will use the retail one.
PlayStation Plus EU,
Far Cry 3, Download is £19.99 and retail is £14.99, so we will use retail one
Giana Sisters: Twisted Dreams, Download is £11.99
Dragons Dogma: Dark Arisen Download is £19.99 and retail is £16.99 so again we will use retail.
Results
Games with Gold, Saving you £20.89
PlayStation Plus EU, Saving you £43.97
As a note, this is just what I could find at the time, prices don't stay the same and may change at anytime, this is nothing more then looking around finding prices.