Since the aileron wasn't changed, just the folding wingtip was left off and faired over, I would think "No."
The 5b had the shorter spawn but also rounded tips, so it's got different aileron size (smaller, slightly).
I wouldn't say left off, they later put it back on the Model-3 I thought. They tried it without in an attempt to simplify production, increase strength and improove performance. Performance-wise it didn't do much, and strength-wise and production-wise... well the folding wingtip is litteraly the last 3-feet (generous estimate) of the wingtip, so again its obmission had negligable impact ot the netire aircraft's production or structural integrity of the entire wing during combat conditions.
