What was updated in the 2018.25MY Mondeo

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Hi guys
Been thinking of getting a Mondeo for the last 9 months on a Novated Lease and am finally about to place the vehicle order.
I have been given a choice. Delivery in 2 weeks for a 2018.25MY Titanium petrol hatch with a 09/2017 build date or wait 12 weeks for delivery of the same vehicle with a 2018 build date.
Is there any advantage of waiting for the later build date?
What is the difference between a 2018.25MY and a 2017.5MY titanium?
Cheers