Federal employees under CSRS stand to come out better than those under FERS, all other things being equal.
Lawmakers find some common ground but likely will move away from it soon.
Like House bill, Senate measure is silent on increase, opening way for White House's proposal to take effect.
Only a small portion of the more than 30,000 appeals have been decided, but none favor employees.
Rules carry out numerous revisions to the law restricting partisan political activities by federal employees, which was enacted more than a year ago.
The Office of Personnel Management and the General Services Administration announced the agreement on Monday.
Workforce size and the amount employees pay toward retirement benefits will be among the issues the House is set to consider.
The House budget plan repeats a proposal to increase the amount federal employees pay toward their retirement benefits.
OPM urges companies participating in the Federal Employees Health Benefits Program to boost their efforts to hold down the cost of prescription drugs.
The FEHB insurance program for federal workers and retirees won't be able to offer the choice for two years.