Sportscoats are typically made from a heavier wool, often with some texture or pattern in the weave.
In general, they are made in *busier* fabrics.

Style purists will argue that sportscoats should never be made out of suiting fabric, as a sportscoat
is not a suit jacket. You can tell them go feck off and do whatever you want, it's your jacket.

However, making Jaeger is going to take some time. Do yourself a favour and get something nice for the final project.
(because you will be making a muslin, right?)