Try proving it wrong. 

I'm not saying that, I'm saying the only indications we actually have (Art Academy) lead to that.  There's also the fact that every DSiWare game so far with a sharing feature (Bomberman, Pop Island, etc) can still share those titles with a standard DS or Lite (meaning they're NOT using extra memory or clock cycles).

You're the one claiming DSi should be considered a separate platform due to DSi/DSiWare games using upgraded spec, you started that argument so the burden of proof to validate it literally rests with you.  Unless I'm misunderstanding and that isn't your argument?  And if it is, then kindly prove it.  Othewise, if your entire argument rests on pure incompatibility with no deeper reasoning on to why that is (content delivery, system spec), then PS2 slim is different from PS2 still. ;)

Argumentum ad ignorantiam.

1) No matter how you try to spin it, the fact is that you can't play DSiware games on ds. That is what I have said. You are the one who argued that it is just distribution thing, so you are the one who have to submit the proof for your claims.

2) PS2 hdd is still a peripheral, which is needed to play few games. PS2 fat can't play those games without peripheral. DSi can play DSiware games without a peripheral. But when Nintendo makes a peripheral which has the cameras, added ram and the better processor, it will be the same as PS2/slim.

Burden of proof.  It's yours.   And I'm not arguing from a point of lack of proof because I already know the truth.  You posited there is a difference, so it is up to you to prove it.

Go back few posts and think again.

Edit:

Actually, read the first quote. :D:D

And I am done with this thread. I see absolutely no reason to argue about this any more.

Lets remember when the PS2 released the slim version with the modem built in, yet you couldnt play FF XI in it, you needed the older version plus the adapter, should these 2 consoles be separated in sales?

My post is merely a trasnposition of what you already posited since the very first post of this thread.  Burden of proof is still yours and you're doing all you can to ignore it and many other similar console situations.  You're argument has already been debunked by historical precedence, industry, retail, and consumer context and yet you still hold to your invalid position.   Until you validate your position with facts that counter those 4 I just listed, your position is one false.

1) No matter how you spin it, the fact is that you can't play FFXI on a PS2 slim.  So I guess, PS2 slim is a new platform by your own definition here.

2) Unless Sony releases a peripheral allowing you to play FFXI on a PS2 slim, it's not the same at all going by your logic. The issue is base incompatibility, you can't play FFXI on a PS2 no matter what.  And really, HDD relient games aren't the only incompatibility between fats and slims... a quick google search will bring up plenty more for you, or hell just look at the previous Gamasutra link I gave you.