Which dell inspiron laptop should I buy for uni and light gaming?

The dell inspiron 13 with i5 5200u 8gb ram, standard 500gb hard drive, worth £499 plus 10% off so £451
or
The dell inspiron 13 with i7 5500u 8 gb ram, 256 ssd worth £640 plus 10% off so £576? both of these are 5 gen cpu. I spoke to dell and they said the dell inspiron 13 2 in 1 might get the 6 gen cpu but they said they dont know. so should I wait or buy it now as I need it for education. plus the 10% is valid to 30 sep