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Well the decision has been made and the Kia is on order! The i10 felt cheaper inside, doesn't look as good outside, was missing some key features I wanted like an alarm and electronic folding mirrors, didn't have full adjustment options for the driver seat, had a shorter warranty and is actually more expensive to insure! And you were right that there was a deep discount as it is being replaced next year. If I had a smaller budget the i10 would have been the one, but as I could spend a bit more the Picanto was definitely worth it.
Thanks for all your advice folks, much appreciated.