A while ago I participated in an online forum discussion about differences in heft, height and the like between figures sold in the same range by one well known manufacturer. While the original poster couched his comments as if alerting newcomers to the firm/range it soon became clear it was little more than a moan that one figure was not a clone of the other. Now, I'm long in the tooth and probably set in my ways, but in respect the this old saw I'm probably and surprisingly rather liberal. That may be because some projects of recent years, especially the FRW drove me that way because of figure availability. Indeed 11 different manufacturers have figures in this collection. Recently my excursion into Pendawar has also drawn me to other manufacturers besides the core from Perry Miniatures.
Different firms and sculptors have always taken different approaches to the scale/size issue, they want you to buy their figures after all. When did 25mm figures stretch to 28mm for example? How did they measure the figures when deciding? And of course, neither is a scale either, but rather a size. Some folk seem always to be consumed by angst when considering figure size comparability. It's easy to see why you might worry for example when mixing Crimean War figures from Britannia, Great War Miniatures and Wargames Foundry in one unit. The differences would go beyond the range people might accept. But, in different units in the same game I think folk could be more comfortable.
Why? Well we see the game as a whole at playing distance, often standing above and back from the troops on the tabletop. When painting figures though we see them close up, warts and all, where differences seem to be exaggerated. A recent acquisition here in GHQ have been two new units for my ACW Union army, respectively from Crusader and Sash & Sabre. The rest of my army is almost exclusively by Dixon Miniatures, quite different size, heft and style. Very noticeable side by side but invisible on the tabletop ~