It's reasonable to expect to obtain simliar EIs and CIs using the same emulsion in different formats _as long as agitation is the same_. Assuming you'd use intermittent agitation for the tanks and continuous agitation with the tray method, the high end of the curve shape _may_ be straighter when using continuous agitation. If this occurs, this would most likely be in a density range much higher than you'd ever get onto the paper.(posted 8701 days ago)Traditionally small-format film benefits from being developed a bit less than larger formats; the reason is that more development increases graininess and decreases sharpness. It also requires a lower EI for the small-format film and printing on higher-contrast paper. Otoh there's no reason at all for not standardizing on development specs for small-format film and printing large formats on higher-contrast paper too.
I do all my testing with 35mm and use the same EIs and development specs for all sizes; results are as expected.
Specifically D-76; I don't find any significant difference between whether intermittent or continuous agitation is used. Also, D-76 1:3 works very well with no exhaustion concerns.
You'd benefit _greatly_ by sticking with one film/developer combination and getting to know it extremely well; your work will be of much higher technical quality than that of someone who's always bouncing around between new miracle films and magic juices.