[Cinisajoy]

Originally Posted by Hitch

Actually, Cins, "new" potatoes mean just that--new. They are the newly-harvested potatoes of any type, so that there can be new reds, new russets, etc. FWIW: https://idahopotato.com/dr-potato/what-are-new-potatoes

Hitch

Down here russets are never referred to as new, but reds are.

They are two different types of potatoes.

Now on topic, for slow or fast cooking, reds hold up much better than russets.
I just knew most recipes (home cooks) if they call for new potatoes mean the red ones.

So just make the stew with your reds.
Russets are better suited to roasting, baking and french frying.