Yes you have a weaker stoneskin, but we get weaker virus and longer cooldown eye for an eye (if the whm levels up to 34 for it). If scholars want more healing power, then white mage should get more shielding. They are both fine as is. Different styles, both effective. The only true argument could be that 2 scholars in a group should be fixed to allow stacking shields.

Our coil group is 1 white mage and 1 scholar and we work very well together. I welcome the shields and prefer it to another white mage honestly.