I am 67 1/2. 140 months of railroad service in 70’s & 80’s. All other work under Social Security. Still working. My spouse worked under SS until age 55, she is 65. Based on MMSS software, she took SS at age 64, and I draw spousal under her SS. The plan was to defer my RRB to age 70, now I am told by RRB that I could take either my SS or RRB now, allow the other to accrue deferred credits until age 70, then switch. Is that correct? If so, which should I take now, then switch to other at 70? Thank you.