I think that Guinn's style of play will lend to playing more consistently. Plus, he's a better athlete that will help defensively.
Leafson had 24 points in 38 minutes. 7 of 16 (44%), 7 of 15 3's (47%), no rebounds
Guinn had 11 points in 36 minutes. 5 of 6 (83%), 1 of 2 3's (50%), 6 rebounds, 1 offensive.
Leafson put almost 3 times the shots to get just over double the points. Again, it's just one scrimmage.
I realize that these are one scrimmage game numbers, but I would see Guinn over Leifson. Leifson did not take it inside, did not rebound and did little defensively. Guinn will bring the variety to mix it up and keep opponents guessing.