There's several versions of the Yokohama Advan tire, so it's still not great info, but better than nothing.
On that note, you still shouldn't be spinning out with those tires, even in the rain. I had Falken Azenis 615's on my '02 and drove all over creation with those things, put roughly 30k on them, yes, 30,000 miles. By the time I got rid of them, they were hard, very noisy and with scratch lines rather than tread. No, they didn't grip like new, but I still never had any mishaps in the rain with them either, and that was a lot of highway driving as well as backroad cruising.
If those Yoko's of yours have plenty of tread on them, then you shouldn't be having any issues with them in the rain IF you're driving properly for the conditions. If not, then it doesn't matter what tire you put on there, you'll still be flying all over the place but the road.