There really is not a good glove to use for both infield and outfield play. The All Star System Seven Series: FGS7-OF features a 12.50 inch pattern and would be best served in the OF only. Most OF's will use 12.75 with some going smaller at 12.50 and others going slightly larger at 13.00. For infield, the sizes range from 11.25-11.75 depending on position and preference.
Yes, the big difference between this All Star System Seven Series (FGS7-OF) and the FGS7-OFL will be the length. (FGS7-OF = 12.5" / FGS7-OFL = 12.75").
The six finger web on the All Star System Seven Series: FGS7-OF will have about the same ability to put two fingers in the pinky stall as any other web type. There is lacing on the pinky stall that can be adjusted in order to create a looser fit that will allow for two fingers to fit comfortably.