Hi
I have never tested whisky as I don't like spirits very much, but on holiday last year I expereimented with different tyoes of alcohol, and found that I can't drink anything but red wine, without it affecteng my levels.
Some, like white wine and beer had gave me a spike, but the fortified wines such as port (which I love) seemd to raise my levels and keep them raised for a few days. So I stick to red wine happy at least I have a drink that I can indulge in occasionally.