The tone varies even with a warm tone developer depending on the exposure & development time, the shorter the dev time the warmer the image, and vice versa.

So someone might dev for 3 minutes in the same developer that I use for 45 seconds and the image colour/tone would be much cooler at 3 mins. Temperature has an effect as well.

I use Id-78 which is just an earlier Ilford warm tone developer (once sold in powder form) than their current Warmtone developer. Dektol with an extra 2 gms per/litre Bromide won't be far behind.