Link to Gauge 1 Model Company -
If the locomotive is ‘lacking in detail’ in comparison to the Aster version, then the Aster version must be one very nicely detailed locomotive. G1MC, I guess, is most likely using Bowande to manufacture their locomotives and coaches. This company has previously produced a G1 model locomotive that was well received in the market and at an affordable price.
Link to Bowande -
Edit: In case anyone doubts the quality capability of this company, here is a Shay I remember being announced many years ago. From memory, Wuhu Arts & Crafts (Bowande) was formed by ex-employees of Accucraft.
http://www.bowande.cn/product/elist1.asp?type_type=1&product_id=27
They also do a Gauge 3 (1/22.5) standard gauge Britannia class locomotive ‘Britannia’.
http://www.bowande.cn/product/elist1.asp?type_type=1&product_id=40