I love Buie as a college player and am no expert on Kolek. That said,some basic things jump out as draft prospects. 1. Buie is nearly 2 years older than Kolek and is smaller 2. Kolek is seen as an elite college passer with that being a skill that might translate to nba 3. Kolek is a better shooter at least statistically.
None of this is an indictment on Buie who is awesome. However I see a near-zero likelihood that Buie gets drafted. His likely option will be a summer league opportunity and perhaps an Exhibit 10 contract (non-guaranteed, allowing teams to waive the player without taking a cap hit. In that situation, the player would earn a bonus of between $5,000 to $50,000 if they remain with the team's G League affiliate for 60 days. (language lifted from Sportingnews.com). Another path would be playing globally. We all know about Shurna's long successful career in Europe. Vic Law is leading his Japanese B league team in scoring this year. Former Ilini Kofi Cockburn is doing well in Korea. Some players have skills that translate better in other leagues.
In a normal draft, I doubt Kolek would sniff the first round however this draft is seemingly dubious in terms of talent. I still think that he will get picked in the 2nd round and will have a two-way contract. A lot can change between now and the draft but a team would have to have a very specific need for a pg to draft him at 23 years old.