There are many threads about this subject.
I have both and a vertical band saw as well.
In all honesty I use my dry cut saw the most, followed by the vertical saw, the horizontal saw is used the least but it has it place.
The dry cut is fast, accurate and really good for what it does. it will plow through tube and angle all day long, it does throw hot chips and make a bit of a mess but the speed makes it worth it to me. The blades are around $100 a piece, I get around 600 cuts before it is resharpened, the last resharpening cost $15 and you can figure that it can be resharpened about 5 times, my math says that each cut then costs $.048 not to bad for the life of a blade.
The horizontal saw is great for thick stuff and can be very accurate when it is tuned up and has a sharp blade, as soon as it dulls a bit it starts to pull to one side of the cut.
The blades cost around $14 for a good bimetal and I get around 75 cuts, so $.18 a cut.
They each have their place in the shop but if I could only have 1 it would be the dry cut saw, cheaper to use and way faster and I could get the same results for the horizontal saw with a portaband.