The Caesar Greek Hoplites are shorter and chunkier than the Zvezda Greek Warriors. But I've discovered that the plastic Caesar uses is very elastic when it's warm. The short, chunky legs can be stretched.
1. Boil a Caesar figure for 15 seconds.
2. Remove and put a fork between it's ankles at the base.
3. Stretch, and while stretching, dip in cold water.
4. Flatten base rubbing it on flat surface.
Voilà. The Caesar figure now has longer, thinner legs, and is now about the same height and proportions as the Zvezda figure. And it's much easier to make a descent phalanx using both sets together.