Well I need to start learning some car lingo I guess,I am use to swash and aeliron

The lipos Ihave are 3s ranging from 2200-2500mah and between 25C and 35C.I have a polycharge 4 and love it. I was just going to store away my heli stuff but would love to have some overlap if I could save some money. I like the look of that HPI Savage Flux HP.I definately would be more interested in something that could go from street to dirt to grass if needs be. Is there something else that separates the 1/8th, 1/10th etc... besides size? Is there a general rule of thumb (ie heli language 250s use 2s, 450's use 3s, micros use the 1s)?