Here's the Grumichama for comparison!

They look like the same plant to me!

@kayjones- yes the two seedling on the left are grumichama, but i need help in the ID for the bottom pic!

From what I can see, the two that look identical and more mature, than the smaller one, also seems the smaller one branched off, where the other two are just one stem.

1) Being older plants, the leaves may get bigger.
Notice how the older leaves on the bigger plants are the same size as your smaller younger plant.

2) Also you mentioned that this one plant was purchased at a different time, so its possible that it was grown under different conditions, ( light, soil, time of year ).

3) Its a seedling, so there can be natural variation.

Grumichamas are a very nice looking plant, here is an older photo of mine. its bigger now.

Thats a Jackfruit, Bay rum, Grumichama, Ylang ylang and i think thats a Pitanga at far right

@tropicdude-Your trees look awesome!

The tree is different because my Grumichama seedlings don't have velvet fluff to the new growth!

The pic at the far right looks like a Jabuticaba! Here's my 5 year old Jabuticaba!

And my Pitanga loaded with fruit!