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The differences are more likely attributed to the underlying engines (DOE-2 and EnergyPlus) rather than the interfaces you're using. The engines take very different approaches to how they structure the problem and model HVAC equipment. As one example: a number of advanced HVAC systems can only be approximated in DOE-2 through clever configuration of input parameters, whereas EnergyPlus allows for explicit modeling of more complex systems. The list of differences between the engines is fairly long, and there are a number of papers on the internet that attempt to dissect them in some detail. Here is a fairly extensive one that may be helpful in explaining some of them.

The differences are more likely attributed to the underlying engines (DOE-2 and EnergyPlus) rather than the interfaces you're using. The engines take very different approaches to how they structure the problem and model HVAC equipment. As one example: a number of advanced HVAC systems can only be approximated in DOE-2 through clever configuration of input parameters, whereas EnergyPlus allows for explicit modeling of more complex systems. The list of differences between the engines is fairly long, and there are a number of papers papers, articles, etc. on the internet that attempt to dissect them in some detail. Here is a fairly extensive one that may be helpful in explaining some of them.

The differences are more likely attributed to the underlying engines (DOE-2 and EnergyPlus) rather than the interfaces you're using. The engines take very different approaches to how they structure the problem and model HVAC equipment. As one example: a number of advanced HVAC systems can only be approximated in DOE-2 through clever configuration of input parameters, whereas EnergyPlus allows for explicit modeling of more complex systems. The list of differences between the engines is fairly long, and there are a number of papers, articles, etc. on the internet that attempt to dissect them in some detail. Here is a fairly extensive one with additional citations that may be helpful in explaining some of them.

The differences are more likely may be attributed to the underlying engines (DOE-2 and EnergyPlus) rather than the interfaces you're using. The engines take very different approaches to how they structure the problem and model HVAC equipment. As one example: a number of advanced HVAC systems can only be approximated in DOE-2 through clever configuration of input parameters, whereas EnergyPlus allows for explicit modeling of more complex systems. The list of differences between the engines is fairly long, and there are a number of papers, articles, etc. on the internet that attempt to dissect them in some detail. Here is a fairly extensive one with additional citations that may be helpful in explaining some of them.