I found the following quote from Zanchius interesting, partly because Peter Martyr was adamant that the fathers of the Old Covenant had the same Spirit and the same Law written on their hearts. Zanchi says:
… the law was not written in their hearts, but remained written onely in tables and therfore did not chaunge men. But the gospell is written by the Holie ghost in the hearts of the elect and therefore it chaungeth and renueth them, because it is the instrument of the Holie ghost to sanctifie and to save us. (De religione christiana fides, 13.VIII.)
I am not positing any sharp discontinuity between Calvin and Vermigli on the one hand and Zanchius on the other, but this emphasis on the role of the Spirit in the New Covenant by the latter does seem more Thomistic.