Is the Stevens 200 SA the same as the Savage 11 SA stagger feed???

Does the current Stevens 200 short action have the same screw spacing, and footprint, as the Savage 11 short action stagger feed 4.25"?
And, Is the back of the receiver flat, or round... Just wondering if the stock and scope bases are interchangeable between the two.
I have a leftover stock and scope base from a Savage 16 W/AccuTrigger, I'm considering buying a Stevens SA, and wonder if these parts will fit.

Current Stevens 200 are center feed and round top , just like everything else.

My 200 is a stagger feed, round top and has a 4.250 bolt spacing.