A modern vertical bow and the average crossbow have essentially the same range and speed. Surprised? It's true.
While one can hold a crossbow steadier because of the stock (although some vertical bows have 99% letoff so can be held back for a long time) estimating distance accurately is critical to accuracy with all bows; 50 yard hits are an exception, not the norm. Deer can easily move before the arrow gets there. Crossbows are much noisier when shot and when cocked so you generally get just one shot. Period. If you want a real challenge, hunt with a crossbow during gun season. If you want to shoot deer hunt with a rifle.