@#$! it.. 172...
Why bother training on an eclipse? If you don't have friends, yeah diamond, if you have friends 172...
2 seats vs 4....
$$$ vs Less $$
faster and more maneverable
10 kts faster, as for maneuverability, during spins and spirals, but otherwise, going pt A to pt B, not much of a big deal, imo(and when you're building hours, speed is a negative factor in most cases)...
Take a fam flight in each and see which one you like.
As for "relevance of type," who is flying 172's in their charter business??? I think I know of 3 companys that have 172s 2 for pipe running and 1 for skydive.
If they get the twin star while you're there, I'd take that bitch in a second, price permitting, but otherwise... as water wings stated apples with worms and rotten apples... no comparison...