Its not the same, because one affects the market price and one doesn't.
If I hypothetically mined 1,000,000 BTC today, the market cap would increase by ~$11,000,000 but that does not mean $11,000,000 was absorbed. If I tried to sell it on MtGox I would destroy the market.
See my clarification at post #9 above. You can't "hypothetically mine" bitcoin. It takes real resources that cost time, money and effort. When you invest these resources you are buying the product when you choose not to sell it.
I was using that as an example because its harder to see the effect of not selling when its 1 btc vs a much larger number.
If you had not "invested the resources" it would still have come into existence, simply for someone else. That is different than actively buying and selling on the open market.