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In theory, it shouldn't cause any difference. In practice, in the past there have been issues/bugs when dealing with different group representations. When defining a group with a set of joints, it is probably best to use only the active joints, and skip the fixed joints.
The alternative is to define the group as a chain, by selecting a starting link ( say torso_lift_link) and an ending link (ex: l_wrist_roll_link), however, there have definitely been issues in the past with the kinematic chain representation, and I think the recommendation at this point in time is to use the active joint representation you are already using.
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