When Morris plays you expect him to go wide, hit the byline and send in crosses toward the striker. Bilalovic - the in-depth tactical analysis I did of him (twitter video ) - appears to be the same.
With Milanovic and Keskinen they're more like inside forwards with the striker essentially creating for them.
Thats two different approaches. A plan A and a plan B.
Significant difference - no, and Thelin explained why in his Q&A the other week - but alone example of changes Thelin can make with different personnel.