Your right it is personal preference. I’ve always found a good dash of collie usually gives a more weather hardy dog, even my short coat collie lurcher was very hardy, but her coat was dense. I’ve a bitch here that is the most weather sensitive dog I’ve ever owned, but once she’s soaked she tends to perk up a bit.
i used to work my whippet all weathers....they’ll do it, but they suffer. Regards lamping.......I agree. I also found the whippet to chase more than get on and strike. Great little dogs, but for me a lurcher allows more flexibility in meeting your personal hunting needs.