BoxRec

Sorry about the probable misspelling here,as I don't feel like bothering to find out the exact spelling of Dariusz's last name.
Just thought of this particularly interesting Mythical/Hypothetical dream-bout,which unfortunately wound up being amongst the Would've Could'ves of Great interesting showdowns, ala Mayweather Jr vs Paul Williams showdown,which Also unfortunately never came to fruition.

In the event that a Jones Jr vs Dariusz bout would've been made,I think that it would've been highly epic.
So hard to decisively predict this type of Hypo. It would ultimately depend on which version of Roy shows up,and the same for Dariusz. I could see the likelihood that Roy would be given fits early on by Dariusz,ala Lou DelVall type of challenge,but personally I think Dariusz was generally better than Lou,so probably a harder time Roy would have in this bout,but probably Roy could still put away Dariusz in the later rounds,or rally enough in the later rounds to pull away on the cards and eck out a fairly decisive UD win. I could definitely see this type of bout winning fight of the year awards back in the day though. The first 8 rounds would've Most Definitely been Awesome for the fans.

roy just too fast, i think dariusz could win 3-4 rounds but roy takes a clear decision

Yeah Roy 9-3 or 8-4

Dariusz was nowhere near Roy.

Jones wide or late TKO, maybe 9 or 10

Roy Jones Jr. either take a decision after out-boxing and out-punching Dariusz with hand speed for a decision win or late round stoppage.

You'll only ever see boxers like Roy Jones every 10-15 years if you're lucky.
It's not a matter of who but how he'd win this and what mood he's in.
Jones KO 7

I think Jones would have won as well. However, it would have been more difficult fight than Jones wanted. Otherwise it would have happened.

Roy by Ud.