Is there a difference between the two?
http/www.scorptec.com.au/computer/51862-g750jx-t4219h
http/www.scorptec.com.au/computer/50379-g750jx-t4134h
http/www.scorptec.com.au/computer/51862-g750jx-t4219h
http/www.scorptec.com.au/computer/50379-g750jx-t4134h