Ok, my first attempt at posting a photo here. The larger figures are Forged in Battle Vikings; the smaller Splintered Light. The S/I figures are often quitte animated in pose, and look a wee bit dwarf-like in stature, but I like them. FiB are straighter and taller standing. Some variation in height is great, but across the Saxons and Vikings that I have from both, the FiB figures are not only taller but very beefy compared to S/I. A few types - e.g., archers - are closer in height but not in size, while some - bondi spearmen, e.g. - are more noticeably dissimilar.
But I like them both, and will just compensate with a thicker base for the S/I chaps, and mount them on their own bases.