The BTD and Foundry match fairly well in size--though for skirmish gaming I'm certainly not a stickler for height/weight of the figure. While the BTD are a bit more robust, they suffer (at least mine) from those horrid, thick plastic bases. I suspect the Foundry figures are a bit more historically accurate in armor and accoutrements--but I don't think BTD are so far out of line so that anyone who is not really, really familiar with the period will spot the differences.