1 Litre or 1.3L?

[Oli]

Hello, currently looking at getting a Yaris as my first ever car. Love the look of it and most importantly the reliability is excellent. I've read some reviews of the 1l and 1.3l, read a few topics on different forums but can't seem to find a straight answer.

Some say the 1.3L is needed, especially for the motorway because the 1L is underpowered. While others say the 1L is fine on the motorway and is pretty nippy in general with very little difference to the 1.3L. I would get the 1.3L except the price difference seems to be a £1k+ or 30,000 miles extra on the mileage. Is it worth it?

Im back at university next year so I may need to use the motorway maybe once a month. Any opinions or advice on this would great. Thanks.