I would agree, and go one further to say if you can get a KJ classic 1 for about ~£600, it is worth it.
Having gone from an AK to a KJ, I feel that difference is worth it.
slightly more cooking space, achieves temp more quickly, and seems to stay there slightly more easily.
That being said, I’m a relatively inexperienced kamado owner, but I just feel the KJ is a better design.