Whose ratings can I trust?

Both are great and have advantages. The G is newer and should in theory be better and slightly sharper. The D version is quicker to focus but cheaper to buy.

I bought the D version a long time ago and see no advantage in paying the extra for the G version. I am tempted at some point to upgrade to the 50mm 1.4 just for the odd occasion I could do with 1.4.

I don't think you'll go far wrong with either of these lens and it boils down to pay a little extra for the newer version (G) or save a little money and for for the older version (D).