How to differentiate Starter and Enterprise store subscription levels in GetStore call response?

We're at eBaymag.com have users with Starter subscription level, but we can't acknowledge it via Trading API. According to https://pages.ebay.com/seller-center/seller-updates/2018-spring/ebay-stores.html there are **5** different store subscription levels available now: Starter, Basic, Premium, Anchor, Enterprise. But in API docs for `GetStore` call https://developer.ebay.com/devzone/xml/docs/reference/ebay/GetStore.html#Response.Store.SubscriptionLevel only **3** levels listed: Basic, Premium, Anchor, and fourth CustomCode reserved for _future use_. Our users with Starter store subscription level are getting `CustomCode` level from `GetStore` API call. I can't see any additional fields in `GetStore` response that would allow distinguishing between these two new store level subscriptions: Starter and Enterprise. Is it possible to certainly say that some given user have Starter store subscription level with information from any API?