I ended up with a Horizontal and started with a vertical . I swapped my vertical for the horizontal because it drops the anchor chain exactly where I want it to
That's one reason
The next reason I felt the 600 watt Atlantic was on the low side where as the Cougar is 1000 watt motor the other yacht is 26 foot so the 600 watt suits it perfectly
That's Reason two
The Atlantic under deck in my boat needed to be to far aft into the forward cabin because of the bow spit
and intruded to much that's what I felt and I would have had to work out a way so the anchor chain would drop into the bow further forward from where it would have it might have been possible but would it work every time.
I have no idea of what design boat you have Sands mine has a bow spit so take that into account and then add a vertical winch means it further aft.
Where as the horizontal all or part of it will be mounted on the bow spit.
Using the horizontal in my boat means I can drain the anchor chain lock at the bow where as the vertical it was giving me grief to be able to achieve this
That's reason three
Both of these winches have never been fitted new second hand
If you could fit either winch the vertical winch offers more chain around the capstan
The original anchor locker has been remove SSands in my walker and I felt difficult to fit and use a winch with and not have to handle the anchor chain.
Plus the intrusion into the forward cabin Where as I can now use the bow to drop my anchor chain
I can set up a hull through drain for the chain
where before you can see the anchor locker to me took up to much room in the forward cabin
Ive no regrets Sands it will work fine for my purposes
and it keep me tinkering
It will cost me half of a new anchor winch much the same for the sailor I swapped with bit of mucking around but save lots of boat dollars
ut 
