Bruno MB, the time for an updated post with all the timeline of PS4 sales in Spain has come!
November 29, 2013 - Launch
December 9, 2013 - 80,000 LTD
December 23, 2013 - 134,000 LTD
January 31, 2014 - 181,000 LTD
June 12, 2014 - 275,000 LTD
October 14, 2014 - 360,000 LTD
Forecast (first 12 months) - 500,000 units
Launch-aligned, PS4 would be slightly behind PS3 which sold 350,000 units in its first 9 month of sales (March 23, 2007 - end of November, 2007)
Xbox One (first 10 months) - around 51,500 units
Xbox 360 (first 9 months) - 70,000 units
Xbox lifetime sales - 275,000 units
PlayStation 2 to Xbox ratio - 18:1
PlayStation 3 to Xbox 360 ratio as of January, 2014 - 2.5:1
PlayStation 4 to Xbox One ratio as of October, 2014 - 7:1