The issue isn't that they have different amounts.

The issue is that a W2 would typically be an error. If the partnership has not elected (or won't be electing) to be treated as a corporation, there would not be payroll for partners. That's the first thing to pursue.

A K-1 is issued to a person having an equity position in the entity. That isn't a problem. If there is in fact supposed to have been payroll, then of course the W2 and the K-1 would not be expected to match, because they report different things.