That's a good question, Banuelos vs Kelly
Well, you have to look at a few things. First is age...
Casey Kelly turns 21 in a month. Manuel Banuelos turns 20 in March, so he's a good 1.5 yrs younger than Kelly- advantage Banuelos
Next, you have to look at the frame.
Kelly is 6'3" and 195 pounds. Banuelos is 5'10" 155lbs- advantage Kelly
Next, you have to look at the FB velocity
Kelly was throwing around 90-92 last season, reports have him in the 93 region this yr, topping out at 95. Banuelos was in the 90-92 range last season, now he is sitting 93 and has hit as high as 97. Slight advantage to Banuelos
Next, you have to look at secondary arsenal. Banuelos has a now plus changeup and a plus potential curve that has been loopy at times this yr. Kelly has a now curveball with a plus potential changeup that he hangs a bit too much at this time. Overall- push
Next you need to look at command. Banuelos has superior fastball command and has pretty similar walk rates in the minors. Kelly's fastball command has been a bit suspect this yr, although he locates his breaking pitches better. Slight advantage Banuelos now, but probably a push overall
The biggest thing separating these guys is their handedness. Banuelos is a lefty, Kelly is a righty. Banuelos throws harder now and strikes more batters out. Kelly has the frame to throw ever harder and still K's a good number, but not the rate that ManBan can. I'd say right now, Banuelos is the better pitcher as he profiles as a top of the rotation starter and really hasnt hit a hitch at any level. But Kelly has more room to grow. Overall, right now, I'd have to go with a push