Pfft... only four of the Kabutops have names- and they've all got different physical features. They're far from the only ones involved too. xD Edge and Stella are the two you'll see if this chapter.
Edge- shorter head. Has a scar on his head between his eyes. Med brown in color. Has barbed scythes
Stella- Two spikes on head, green eyes, lighter in color, has a necklace.
Kabutops from Prologue- Normal shaped head, two line scar on head, x-shaped scar on chest. Normal kabutops color. Also has a nick in one of his scythes.
Kabutops in page 05-11- Extra spikey, dark in color.
So yes- every individual Kabutops- even the unnamed/unimportant ones will have different features to set them apart. I try to make the features obvious. Originally, the Kabutops from the prologue was supposed to be in Edge's place- but that'd make no sense- he'd kill the twins without a second thought, so I swapped him for Edge who is far more likely to underestimate the twins and get himself in a... heh.... sticky situation. xD
Also, another note- Kabutops cannot learn Rock Blast. So that prologue Kabutops was NOT alone. =P There's a handful of subtle details scattered about.