Matt,
I really like that pose. the form should be fine for your early season cape as long as you are replacing it with an early season cape. Besides that deer in that pic from coombs looks to be a shorter haired early season cape. so as long as your taxidermist doesnt go and sand the muscle creases to defined and make it look like hercules it should come out just fine. besides the early season cape can only be put on a form that matches the neckmeasurements the cape has. This is the form your talking about right?? also this pic might be showing a deer with say a 20" neck. your cape might only be 17" without as much swell so it wont look quite as "beefy".