A big block Chevy looks like...well, any other big block Chevy. There is no major visual difference between a 396 and an L88. But a hemi looks like no other engine, except for what they run in Top Fuel. Maybe it boils down to the fact that the hemi is just a name everyone knows (even though they may have no idea what it means other than FAST)...and its a lot sexier to look at.