I need a new laptop - but price is an issue and not interested in used. So I've been looking at the MB Air's - I need the 256GB HD - so the current price difference is $130 between the 2016 and 2017 - and the only difference is processor - but unless I've read wrong, they are both still Broadwell processors - just 1.6 vs. 1.8 clock speed. So my question to the experts here - is that difference even noticeable? And if so, is it a big enough difference to pay an extra $130?