Alf is correct regarding inductive vs. resistive loads..... It's also called inrush or start up current (amps)...
Voltage drop, acceptable,... according to ABYC, ABS, Lloyds, and NEA, is 3% for AC loads, for critical systems,..... hardly a consideration for residential use from a generator. The voltage drop is actually more of a factor for DC loads.
It always comes down to load management. You can't run your window unit, fridge, micro, lamps, blender, and deep freezer on a china made 14/16g ext cord, with a genset rated for 9 amps.
Something will kick out.
Keep your priorities simple, rotate your loads, or buy bigger kw.