Hi there
Welcome to the UK.
Both cages seem fine and offer lots of space to run around and put in different substrates and enrichment. You could always make your own cage which I did, using IKEA stuff. It cost me around £200 and was really good as I could organise it without any restrictions and you can build it to a size to suit you.
Building an IKEA Linnmon Cage! - YouTube
Here is the video I watched!
Hope this helps.