D&D vs. d20 GSL: What's the Difference?

[jaldaen]

So here's my question:

What will be the differences between the D&D GSL and the d20 GSL?

For those who don't know what the d20 GSL is here's an excerpt from one of WotC's Press Releases:

Wizards is also working on the details of a second royalty-free license, the d20 Game System License (d20 GSL). This license will allow third-party publishers to create roleplaying game products in non-fantasy settings with the 4E rules. The exact details for the d20 GSL will be released as they become available.

Is there the possibility that the D&D GSL is specifically designed specifically for publishers to create D&D compatible supplements (like rules add-ons [not redefinitions, revisions, or alterations], adventures, etc.) and nothing else, while the d20 GSL would allow for more freedom with the 4e rules (such as campaign settings)?

Perhaps the D&D GSL looks so restricting b/c WotC has created two licenses that allow for two different levels of compatibility.

The D&D GSL allows you to use the D&D Compatibility Logo (which is for products that directly support D&D and only D&D), while the d20 GSL will allow products to use a d20 Compatibility Logo without all the 4e Reference restrictions (such as not being able to redefine races, classes, monsters, etc).

This is my hope, but I am not certain of it by any stretch of the imagination (after all it might just be a repeat of the 4e D&D SRD, but minus the fantasy elements). However, it would be nice to have the d20 GSL to look at before deciding what to do with future products.

Is there any ETA on the d20 GSL? After all if it does what I hope, then perhaps it is what we (designers/publishers) were hoping for, just without the D&D Compatibility Logo.