Each stove and brand will boast different features, so comparing them all side by side can be difficult. I can tell you that the MSR XGK is a stove I like. With that said, however, I certainly wouldn't downplay the Nova+ and several other stoves you have listed here. All are high quality options.
The preinstalled GK Jet in this stove is used for white gas, kerosene, unleaded auto gas, and aviation gas.
Fuel bottles are sold separately and come in different sizes. You can see the product page here: http://www.campsaver.com/fuel-bottle-2
Fuel bottles are sold separately and come in different sizes. You can see the product page here: http://www.campsaver.com/fuel-bottle-2
You can certainly move from a simmer to full blast.
This stove comes with a windscreen, tool, and a small maintenance kit.
The MSR XGK comes with two jets.
1. The GK Jet is used for white gas, kerosene, unleaded auto gas, and aviation gas.
This Jet is preinstalled in your stove.
2. The X Jet is for jet fuel, and diesel. This Jet is included in the parts kit with your stove.
The MSR XGK comes with two jets.
1. The GK Jet is used for white gas, kerosene, unleaded auto gas, and aviation gas.
This Jet is preinstalled in your stove.
2. The X Jet is for jet fuel, and diesel. This Jet is included in the parts kit with your stove.