yes, it is
If the benefit on your record is higher then he will get an additional amount on your record so that the combination of benefits equals that higher amount .
Very well. Regarding what I can receive, can this reduce the retirement benefits my spouse receives?
Benefits paid to you as a spouse will not decrease your spouse's retirement benefit. In fact, the value of the benefits you can receive, added to your benefits, can help your spouse decide whether taking benefits earlier may be more advantageous.