Essentially they are the same film emulsion so the grain that is produced on film will be appoximately the same structure and size regardless of film format. It is the enlargement factor which makes a difference when the film grain is enlarged enough to make a visible difference in the print.
Ultra fine grained film developed in specific developers will show no grain until you get to really BIG enlargement factors. But it's not only the grain itself, it is the acutance of the grain clumps which have localised edge effects which make an image look sharper and at the same time enhance the visibility of grain clumps in the print. So its swings and roundabouts. You have to find a happy medium which suits your personal aesthetic. Ultrafine grain in film can make a print look lifeless as it usually has little acutance.
Developers like rodinal can create much higher acutance grain whereas a developer like perceptol will create very fine grain but with less acutance. Standard developers like ID11/D76 are in the middle and have an optimal balance between grain clump size and acutance.
As always YMMV. some people prefer more acutance and some people less and some in the middle. Take your pick.
Thanks for the reply. Useful info to gain.
I did not have the liberty of easily available developers. Would love to try out various options available but practically not cost effective for me. The only one locally available in my part of the world is ILFOSOL-3 and the other D76 that I ordered online cost me a bomb with shipping charges :/

