The "Standard" winch for the Deuce is a PTO 10k.
The "Standard" winch for the 5 ton is a 20k hydraulic.
Many people will argue that both the PTO and hydraulic are "Stronger" that the electric of the same rating. I'll not argue that point as it is actually not all that relevant.
In another thread here on SS I listed some of the equipment that I consider a minimum list for a vehicle that you intend to take off road. (
http://www.steelsoldiers.com/deuce/62241-help-need-pulled-out-mud-houston-pasadena-tx-7.html )
With the equipment on that list and more importantly THE SENSE TO KNOW YOUR STUCK AND STOP MAKING IT WORSE will get you out of most "Stucks".
The winch on the Deuce (10k PTO) is note nough winch for a truck that size if you get it stuck badly enough. Neither is the winch on the 5 ton (20k hydraulic).
On a Deuce the 18k Warn carries almost 2x the rating of the "Standard" PTO(10k). On the 5 ton the Warn 18k is pretty darn close to the rating of the "Standard" 5 ton winch (20k).
Again, avoiding the electric/PTO/hydraulic argument I suggest that given the proper ancillary equipment (see the above mentioned post) some EDUCATION on the proper use of the winch and ancillary equipment and as noted, enough sense to know your stuck and stop making it worse the 18k Warn will be sufficient in most situations.
Although very difficult to "Prove" I would be willing to bet that If your stuck and are using the same methods and ancillary equipment that if the 18k is not enough to get you out, the 20k would not get it done either.
That said; Would I like a larger winch on a 5 ton than the Warn 18k? Sure. If there was a 30k electric I would want it. The electric is physically much smaller and lighter in size and is much easier to install than either the PTO or hydraulic.
For professional use on a wrecker, construction, oil field or other application where the winch is going to be used regularly and heavily then the PTO or hydraulic are more rugged and will have a longer life.
For "Recreational" use on a civilian MV or other off road vehicle the extra ruggedness that allows for daily professional use is not needed. The reduction in cost, reduction in complexity of installing and easier to use makes the 18k a very viable option.
Again, by initiating the winching operation early in the "Stuck" rather than burying the vehicle to the roof, having/using the proper ancillary equipment and having/using the proper education on the winch/ancillary equipment you should be good to go.
Not to mention that the Warn 18k costs less new than a used PTO or hydraulic (And that is before you add the extra stuff you need (PTO shafts, hydraulic controls and pump..)
I would recommend that you add an extra battery and/or the highest output alternator you can get your hands on. Use some common sense when using any winch, including allowing it to rest/cool and the batteries to recharge (Or better, to remain charged) as needed. (Even the PTO and hydraulic winches need this!)
Your mileage may vary....
Hope this helps...