Both companies cover renewables/cleantech:
Marathon Capital - seems more focused on project finance and hard asset financing/M&A.
Greentech Capital - seems more broad (i.e. energy-related software deals as well) and get the more "brand-name" deals . Also Senior ppl seem to come from ex-Bulge Brackets.
Am I Missing anything? Which firm is mre well-regarded? Does one have a more international scope than another? Which teaches hard skills more comprehensively? Add-on: because exrelationships, is GTC mostly the co-advisors on a deal? (aka reviewing the lead BB's work).