What is the difference between GASGAS 250 and 300?

I'm curious to understand the distinction between the GASGAS 250 and 300 motorcycles. Could you elaborate on the key differences in terms of engine displacement, horsepower, torque, and perhaps even the riding experience? Additionally, how do these factors translate into on-road performance and off-road capabilities? Furthermore, are there any significant differences in weight, dimensions, or handling between the two models? Lastly, how do the pricing and availability compare between the GASGAS 250 and 300? I'd appreciate a concise yet comprehensive breakdown of these points.