Anyone who is using 3D printing on regular basis and using those parts for sample testing. Can you please check the attached part (SW 2014 file) and suggest which would be better in terms of strength; the one with the grooves OR no grooves. OR can you suggest some ways to improve strength for a simple cylindrical part.

I believe the one with grooves should be better compared to one with no grooves but still open to any suggestion/advice. Thanks in advance for any help/advice.