I would have to say that both engine replicas have their advantages......

The picture is good for those who may not expect to have the arf long, want to save weight for electrics, dont have the time to invest in making the dummy radial look right, or intend for it to be a daily flyer and just dont care.,,,,

while as the dummy radial is more scale up close and personal and shows time/skill..... I think most people dont take the time to properly detail the dummy radials.

Both have their purpose.

Nice build!, looking forward to seeing it completed.