Well, Kaichos Man is right about Lobsters and Scorpions being superficially similar. But they're pretty distantly related. Certainly far more distantly than ostriches and archaeopteryx.
I suspect that under the hood (DNA, etc) they're quite dissimilar.
Welcome to EvC by the way. Always a pleasure to have fresh meat... uhm... new blood in the forums.
Respectfully,
-Meldinoor
HINT: When replying to someone, be sure to hit the "reply" button at the bottom of the post you're responding to, and not the Gen Reply button. That way they'll know you replied.
Edited by Meldinoor, : No reason given.