It's great your DD slept so well with a DF from so early but she really was the exception rather than the rule. I would just feed him when he wakes at night and resettle him as soon as possible - going from the DF (or bedtime feed really if he isn't taking the DF) to 3am is really good at 10 weeks. At this age he needs frequent feeds and there is a growth spurt at 3 months and 4 months so he will need those nightfeeds still.
PU/PD isn't suitable for a 10 week old baby, it's for babies who are 4 months + and for when all other things have been tried, it's just too stimulating for them. At this age you really need to use shh/pat
http://babywhispererforums.com/index.php?topic=26672.0. Are you swaddling at all?
Have you tried the DF a bit earlier? It's not recommended to do it any later than 11, but you could try at 10pm and see if that helps. If 10pm is no better try 10.30, it could be catching him in a different part of his sleep cycle makes a difference. Some babies just don't take to the DF, my two didn't so we just waited for them to wake when they were hungry.
The other thing to think about is could the colic be reflux?
http://babywhispererforums.com/index.php?topic=654.0 have a look here and see if anything rings a bell.
Laura