That still doesn't explain the difference between non-Google experience phones since you're saying they both come with same package of pre-installed Google Apps on them. Not really a big deal until you read that Google is not allowing HTC Sense to be loaded on Google Experience phones while allowing HTC Hero to ship with the same Google Experience Apps on there. Maybe it's a question more for Google, but I don't see the advantage of buying a Google Experience phone if every Android phone can put their logo and bundle "Experience" apps on them.

That still doesn't explain the difference between non-Google experience phones since you're saying they both come with same package of pre-installed Google Apps on them. Not really a big deal until you read that Google is not allowing HTC Sense to be loaded on Google Experience phones while allowing HTC Hero to ship with the same Google Experience Apps on there. Maybe it's a question more for Google, but I don't see the advantage of buying a Google Experience phone if every Android phone can put their logo and bundle "Experience" apps on them.

What does Exchange: Depends on version mean?

You may be out of luck Jim, the myTouch has the same amount of built in memory as the G1. I can't see why one phone with the same amount of space would be excluded.