Both are young shortstops who were highly sought after prospects. I know Didi doesn't have the offensive ability that Xander does but you can still compare
Im in the running for a baseball operations internship, I'll let everyone know how it goes. As far as the bullpen goes, I think you throw as many flies on the wall and see what sticks. I like Ogando though.
On a Daniel Bard note, I did an internship with his brother in law last summer and he told me that after a few starts he wanted to go back to the bullpen but management up top thought that they would look inept and unreliable if they gave up on him too soon as a starter. Quite a sad story considering the fact that he was pitching for Texas' single A team and allowed 5 earned runs without giving up a hit. All the baserunners were walks and hbp.