WP simulator performance how ?

I made a WP game simulator operating normally, but users generally comment after download too card .

So I would like to ask , simulators and real machine performance comparison how ?
Did simulator performance greatly exceeded the actual machine ?
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simulator is not possible to select the type of memory do ? But after all, is an analog simulation .

If there is a real machine , try it with a real machine .
I never like to use the simulator.
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820, cheaper
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test , then engage in a configuration of the bottom of some good, as long as it should be no problem with

you put forward a good configuration , even if I can , can not be used to determine whether low with
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User reviews too card, I tried WP7 256MB the simulator, but I still feel very smooth . So depressed ah

also considering starting a development machine , but WP phones are so expensive
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User reviews too card, I tried WP7 256MB the simulator, but I still feel very smooth . So depressed ah      
  
also considering starting a development machine , but WP phones are so expensive     

520. 900 or so.
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User reviews too card, I tried WP7 256MB the simulator, but I still feel very smooth . So depressed ah          
    
also considering starting a development machine , but WP phones are so expensive               
  
520. 900 or so.  

Well, this machine is good. But now would like to buy a second-hand, because only used to test the game , can be used on the line .
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User reviews too card, I tried WP7 256MB the simulator, but I still feel very smooth . So depressed ah              
      
also considering starting a development machine , but WP phones are so expensive                       
    
520. 900 or so.          
  
Well, this machine is good. But now would like to buy a second-hand, because only used to test the game , can be used on the line .  
also available. Used 520 cheaper.
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Thank you for your help , it seems that the mystery of the performance of the simulator might I can not find the answer , it is tricky to pick a development machine to buy it.