Last 5 seasons...
Premier League
2009/10: 1,053 goals scored
2010/11: 1,063 goals scored
2011/12: 1,066 goals scored
2012/13: 1,063 goals scored
2013/14: 1,052 goals scored
TOTAL: 5,297 goals scored
La Liga
2009/10: 1,031 goals scored
2010/11: 1,042 goals scored
2011/12: 1,050 goals scored
2012/13: 1,091 goals scored
2013/14: 1,045 goals scored
TOTAL: 5,259 goals scored
CONCLUSION: La Liga is better defensively than the Premier League.