In the first pic the coloring of that keet looks like a male Buff Dundotte to me because it appears to be tan-ish in color, not blue-ish/grey-ish.
In the 2nd pic it sort of looks like a Lite Lavender or a Porcelain, because it has quite a bit of color, but Porcelains are are usually much lighter, and lean towards being a faint blue/grey.
It's not an Opaline tho, it would have broken thin stripes on it's head, leaning more towards blue/grey color, with white wings. This keet has a wide stripe on its head with thin stripes on each side of the wide stripe, and colored wings indicating it will be a fully pearled adult. Opalines are partially pearled.
Watch the feather shafts under it's wings as it feathers out. If they are blue/grey tinted at all it's possible that it may be a Porcelain, otherwise male Buff Dundotte would still be my guess.
Cute keet tho
This is a pic of a male Buff Dundotte (from the back) that I hatched 2 yrs ago, I still have him running around free ranging: