The blue one has recently been investigated and passed over by
@WayneoA2. When Wayne enquired after it, the advert was misleading as to its specification, and the seller gave him the runaround. That advert is greatly over-egging it in general, possibly to justfiy a rather inflated price for what's essentially a base-spec car, but it makes me wonder what's it hiding? It just doesn't feel as straight as the red one - equally a somewhat spartan Special Edition, but not making any bones about it.
Of the two, I'd check out the red one first, and not bother with the blue one if I liked it. The seller of the red one appears to have done the more urgent advisories from its MOT according to the advert. Looks to be in very nice condition and as others have said, a very attractive colour, looks like the rear spoiler has also been sprayed to match. FYI I think I recognise the location of the photos as the far end of Downley common on the edge of High Wycombe, my parents live not far from there.
The major difference between the two is the red one has Climate, the blue one has no AC just normal heating, but it has a towbar. Climate can't be retrofitted, but although a towbar can be, you might not have any use for it. Particularly pertinent in this cold weather, the blue one should have an auxiliary diesel pre-heater but these are often inop at this age and if so, neither the engine nor the cabin will warm up (the thermostat also has to be working properly for this). The red one will have an electric aux heater that will at least keep the cabin warm whatever's going on with engine heat.
Good luck with your search.