Well, inevitably there just HAS to be a discussion of this, it's one of the most popular and perhaps important topic of shared info regarding figs. Amazingly, I didn't even think to compare them and I didn't notice a size discrepancy until I started to play around with basing schemes. Check out the photographic evidence:
The Romanoff has longer legs and is a bit bulkier. They're a net 2-3mm taller and I probably wouldn't mix them in the same regiment altho they'd be fine on the same table. This is important b/c there isn't a ton of 40mm sculpts out there for ECW. The variety Romanoff offers is quite useful for my early war style of regiments, and I wouldn't want to have to pass on them. The identical pics just vary the light conditions as each shows different aspects better, I think. At some point I need to get some Jacdaw figs as well:
While the Romanoff are more expensive and take some time to assemble, I still enjoy the final result and look forward to the command pack. I'll add some pike to it as well for a full regiment which I intend to use as Trained Bande. Then they too can fight for either side!