I have used both of these units on boats of various sizes, they work
very well, but I always wonder when people say things like "if you add more chain you need a bigger winch".
No, the amount of chain does not really matter, as the maximum weight the winch has to lift
is the lenght of chain of the depth
, plus weight of anchor, plus some friction losses of bowroller. Yes I know, sometimes the bow is pulled around, anchor is stuck etc, so the forces are higher than just the weight of chain+anchor.
I have a different brand winch with a same chain size and larger anchor. My winch has a 1500 Watt motor
. The reduction is quite big, and is slow and but has no trouble to lift
(age of winch is several decades).
Bigger motors may be able to lift heavier things, but the other issue is that the speed of winching can be quicker with a bigger unit. That is very important (to me).
The last issue is duty cycle. A winch that is operating very close to its limit, overheats more easily, not good. I would like to have some reserve capacity.
The very last issue, if you were to install a bigger winch you almost certainly need to upgrade you cabling and breakers. No good to have a bigger winch that draws more amps and lose then lots of power with excessive voltage drop.
I am quite happy with what I have now, and certainly would not upgrade, but....if I had to buy new, I would buy the biggest one that would physically fit, the fastest speed (rate of winching).... if my bankaccount would allow me.