Two competing portrayals of Norwest Corporation and Wells Fargo emerged in a federal researve board hearing on their proposed merger today in Minneapolis. Supporters praised the banks commitment to poor and minority communities, while critics blasted their lending and consumer banking practices. But as Minnesota PUblic Radio's Bill Catlin reports, the hearing is not expected to have much impact on whether the merger proceeds. SFX The day began with about 3 dozen protesaters from community a