A Volkswagen Golf that is already one year old will already have done a big chunk of its depreciating. The Corolla, on the other hand, will – like all brand-new cars – dump value like crazy. That said, both cars have a fair way to go in depreciation terms. Keeping them for just a year won’t help there, either, as you’ll effectively be maximising the amount you lose.
The trade regards the Corolla (as a Toyota) very highly and, as such, resale values tend to be better than a lot of cars. The VW Golf, meanwhile, still suffers from the stigma of the reliability problems many owners experienced and can be a little more difficult to unload without resorting to selling it to a wholesaler who will make you really understand what depreciation means.