Default Octa Core 3G vs Quad Core 4g AGAIN??

I am looking at buying this but i am now once again confused which one, the cheaper one to get is the octa core , but 4G is becoming VERY hard to turn down now... So i think its going to be the quad.

I am from Australia the standard is the 4G Quad.

Whats your thoughts and howcome there is not a thread for both phones like last year
IPhone 3GS >> Iphone 4 >> Samsung GS3 I9300 [3g + 1GB ram] >> Samsung GS3 I9305 [4g + 2GB ram] >> Samsung GS4 I9505 LTE >> Samsung GS5 SM-G900i LTE

Best Antutu = 45,745 @ 2688mhz

My Work:

-=PandoriaM=- Rom for SGS3 4G I9305