It is quite impossible to compare which standard of pronunciation (General American or RP/Estuary English) is more similar to Early Modern English. This is due to two factors; firstly, we have no proper evidence of how words were pronounced in the 17th century, so we can only speculate and secondly, Early Modern English was atleast as linguistically varied as the English spoken around the world today.
The problem with the whole question is that there was no original Early Modern English standard, especially in speech, just as there is no real standard in speech these days. Even written standardisation started first with William Caxton's decision to print books in the Midlands variety of Early Modern English, thus making it the most influential variety of written English. If are dead-set on making your comparison, then comparison of written language is the only perfectly possible method due to the existence of source material and something of a standard from the 16th century onward.
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