Display More*does a quick test*
Oh, well that's fascinating...
Thermal Expansion's Magmatic Engines reflect more of the core heat value of Lava, and therefor output more EU via conversion than standard Geothermal Generators. Not much though. It's only a 4k difference, but it's enough to make a Redstone Energy setup worth the investment...
(And since I keep getting trapped in snow biomes with no damn rubber, Thermal Ex is about the only tech I can really rely on... lol)
Edit: After doing an EU test, the Magmatic Engines produce a total of 1.55 MEu after a full stack of lava cell consumption. This includes spin-up time for engine heating. Standard EU production off a normal Geo grid is 1.28 MEu...
(and this is off the 3:4 ratio as well)
so there's an increase of about 17% power when using these engines in comparison to standard IC2 play.
wow, and there I thought, how much lava they eat.O_o I was so wrong lol