it does look like two different kinda to me-reidi and kuda.
about the only differences-adult size (yes-in the wild, 12 inches is common, but in our aquariums, realistically-8)
reidi have spikes
and longer snouts... Kuda got stubby-ish snouts in comparison. reidi also have 5 points on thier crown (ummm, at least, I THINK its the reidi-silly seahorses)
kuda's crown is tilted back, while the reidi have a crown that isn't tilted back (that part I have problems with-and some kuda have high crowns, or low crowns...oh, cornets, not crowns..duh)
otherwise, they are exactly the same. if you look at them from thier back, if you see spikes on thier bodies, chances are they are reidi. if there are no spikes, they are kuda. you can see in the yellow reidi pictures the spikiness of thier bodies... kuda just don't have quite that amount of spikes.