These are Gen 3:
Got no problem with these. They look very well distinguished and I like Shiny Latias's goldish color.
Now let's focus particularly on the Shiny Latias.
These are Gen 4:
Diamond/Pearl - Really good aesthetic and I like these the most but they completely put the wrong eye color. They mixed it up with the regular Latias.
Platinum - They tried to fix it but only did half the job.
HeartGold/SoulSilver - There you go now it's completely fixed!


Got no problem with these. They look very well distinguished and I like Shiny Latias's goldish color.
Now let's focus particularly on the Shiny Latias.
These are Gen 4:


Diamond/Pearl - Really good aesthetic and I like these the most but they completely put the wrong eye color. They mixed it up with the regular Latias.


Platinum - They tried to fix it but only did half the job.


HeartGold/SoulSilver - There you go now it's completely fixed!