If it's the next version,then it's dawned on you; how you would fork it,the instructions you would give and how you want to operate with it.
It takes alot of time,comsumes power and is somewhat slow for miners at a larger rate
While,dogecoin on the other hand mines faster and unlimitedly,; (miners have developed the new-age mining system and they have also curtailed exothermic reactions from thier mining machines,inshort i don't even think you need a machine to mine dogecoin,an upgraded linux system could do)
About these,genesis blocks can be made equal through FORKING; all of these depends on the instructions and information the nodes carries,it not about the file name though; but you could possibly change these informations to your simple commands by 'forking' bitcoins into your prefered altcoin (this will make your nodes carry your own instructions,either to enable monetary transfer or not)