Ah, the topic of scale variations raises its head again!
I'll further complicate things by saying that DelPrado does not apply a consistent scale within its own catalog. For example, I have a Prussian cuirassier officer at the Battle of Leuthen, from their "Cavalry Through the Ages" line (I think that's the name of that line), and it is pretty close to 54mm, matching my (new) Britains, Frankling Mint and Rose figures. But I also have some of DelPrado's excellent samurai, and they are definitely larger than that cavalry figure, scaling out around 1/30.
We've often discussed scale variations, and each of us seems to find his own standard to apply. So, some mix figures of different scales, but that are not so different that they appear as nothing so much as the normal variation in any group of people, and others choose not to mix them at all.
For me, scale is important, but it's only one of several factors that I consider. I also look at the sculpting and painting style of the figures, and the level of detail.
Prost!
Brad