Pretty much any liquid that is mostly water is about the same. Even the thing about coffee/caffeine as a diuretic is mostly myth; technically true, but such a weak one that you can still hydrate fine. In fact, when they tested people who drink coffee regularly there was no difference in the hydration value of coffee and plan water.

152 this morning. I didn't expect that drop, but speaking of water I do feel like the change in diet the last couple of days (almost no sugar and not many other carbs) is dehydrating me.