Youhana v Chanderpaul - about equal. Consider where most of Youhana's success has come.
Against WI? Against Walsh and Ambrose in their prime? Youhana is about as good as Chanderpaul in tests and Chanderpaul is better then him in ODI's IMO.
Comparing Pak vs WI
Butt vs Gayle - Gayle is a better batsman at this stage but Butt has the potential to outplay him in the future.
Akmal vs Browne - I'd give Akmal a slight edge since he can show patches of brilliance amidst extremely ordinary cricket
Khan/Hameed vs Sarawan - Sarawan by a long shot.
Lara vs Inzy - Lara though both these players dwarf all others in the team
Afridi vs Powell - Equal
Chanderpaul vs Youhana - Chanderpaul in ODI'S, Youhana in tests. [Though it is intresting to note that Youhana averages more then 55 at number 3 slot, from more then 40 matches which weren't all played against zim and bangladesh]
Razzaq vs Bravo - Razzaq, no contest
Azhar Mahmood vs Bradshaw - Again, Mahmood, no contest
Bowling
Dillion vs Akhtar - Akhtar
Collins vs Rana - About equal IMO
Bradshaw vs Razzaq - about equal
Samuels vs Afridi - Afridi by a long shot
Bravo vs Mahmood - about equal
Hafeez vs Sarawan - I know who I'd be picking
Malik vs Gayle - Malik slightly
Kaneria vs ?
If fit, Saqlain vs ?, Shabbir vs ?
On the whole WI team certainly isn't better then Pakistan though they boast a better top-order lineup. And Pakistan have a far more ballanced attack, specially if Malik gets cleared.