The core difference is the end date. Most GCC agencies are structured to keep a client on retainer indefinitely; Kando builds toward a named transfer date and hands the growth engine to the in-house team. It also starts from the business question rather than a channel, so it isn't selling paid media or SEO by default — it's diagnosing what the business actually needs first.
That combination — Build, Run, Transfer, plus in-house teams doing the work alongside Kando rather than watching from the sidelines — is what most traditional retained agencies aren't set up to offer.