For one thing, we can use “would” in this way only if we’ve already established that we’re talking about the past. In your examples, we use “used to” first, and then give additional information using “would”.
For another thing, “would” can be used in this way only with dynamic (action) verbs, not with verbs of state. With verbs of state, “would” is understood as a conditional.
Thirdly, this usage of “would” usually involves a temporal adverb (always, never, usually, sometimes, etc.) immediately after it.
Finally, and this is very subtle (almost not worthy of mention), the phrase with “used to” places a bit more emphasis on the fact that the action or state is no longer happening.
By the way, I’m also a fan of "Touchstone" :)