most variable rates would be quoted on a tiered basis, therefore you would be paying a lower variable interest rate on a lower amount, i.e €1000 compared to a higher rate for the loan you were looking for.
i would always recommend a variable rate as there are more options available to you such as paying in lump sums, as usually with these loans there are no charges or penalties for doing this, so in the long run you can finish your loan sooner. there should also be a small fee for clearing full amount off.