Deep waters tend to shut up shop in winter, they hold those cold temps and even the best conditions cant warm them up. Shallower waters have the chance to respond to higher winter temps.
Either way, I've spent many a winter on low stock pits. One fish a year is a mega result. Most years it's no fish.
If you have the balls then go for it but nowadays I tend to go for higher stocked waters in winter. Any fish is a result when the temps drop imo.
Good luck bud๐๐