Barkley averaged more points/rebounds
Pippen averaged more steals, assists
Who you taking at that position? Pippen is an elite athletic defender with length who can do everything. Barkley is a workhorse who can play super physical and can score and rebound and can intimidate and was an nba mvp. Pippen was a 6 time nba champion who elevated the bulls from an 80s team with jordan who could score to a team that could win and who could eventually be considered the greatest team ever.
I think I go with Pippen because I think his defense puts him over the top of Barkley.