Yes, you can use the Ilford MG curves for any MG paper because they are all slight variations of a two layer emulsion with silver chloride for low contrast and silver bromide for high contrast that are activated by yellow/green or blue/magenta light, respectively.?
The whole reason to use a low contrast filter in the enlarger stage (above the negative) is to minimize the contrast between the ink dots. The ink dots are high contrast, and when combined with a hard/glossy baryta paper surface won't get smoothed like they do with watercolor papers using hand-coated processes.?
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If you start with low contrast light coming through the gaps between the dots, the contrast of those gaps will be lower (and give you better shadow separation) and the higher overlapping ink load with the K and Lm/M inks in the midtones and highlights will activate the higher contrast emulsion to get a full tonal range in the print ?
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If you edit your image properly to get a full range of tones and built the contrast where you need it in the image, then there will be no need to change filters in the enlarger to throw off your well-calibrated curves.
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Hope that helps,?
Richard Boutwell?
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Richard Boutwell