"Offset lifters are used when a cylinder head company moves the pushrod location to make room for larger intake ports. This offset can put the pushrod in an angle which can cause clearance issues and higher chances of deflection. Lifters with .150", .180", and .200" offset seat either Right or Left correct the angle problem."
Mfg Performance Parts
" Often an offset rocker can be combined with an offset lifter to move the pushrod out of the way of a wide intake port. Many engine builders would rather include as much offset in the rocker as possible since they feel that the tradeoff of increased lifter bore loading from the offset lifter can be excessive, while others are willing to accept increased lifter bore wear in favor of less angle on the pushrod. Lifter offset also reduces the amount of offset required from the rocker arm. It’s always a good idea to operate a pushrod as close to vertical as possible, since pushrod angle also imparts a bending moment into the pushrod that is not an issue in pure vertical motion."
And the answer to my question..... the longer pushrod would reduce the angularity relationship.