The event featured a series of regional qualifiers, followed by the final event at the South West Snooker Academy in Gloucester.
London's 25-year-old O'Donnell beat Sydney Wilson in the quarter-finals and Jonny Williams in the semis, while Ireland's 31-year-old Sutton saw off former Scottish Open champion David Gray and Zak Surety.
In reaching the final, both men had guaranteed a spot at Q School, and it was O'Donnell who went on to take the title with a 4-0 victory.
O'Donnell, whose prize also included entry into four Players Tour Championship events next season, said: "I was delighted to win and it was a great event, very well run by SnookerBacker.
"Now comes the hard part as my goal now is to get through Q School. Last year I got to the final round of the last event and lost to Kurt Maflin, I didn't do much wrong and he played brilliantly on the day. I've got more experience now having played in a lot of PTC events this season and reached the semi-finals of the European Amateur. Hopefully I'm a better player now and I can hit form at the right time for Q School.
"I'm really looking forward to it because the playing conditions at the World Snooker Academy in Sheffield are second to none. The tables are perfect, you have referees and you feel like a proper player. That's where you find out if you are good enough.
"I practise a lot with Martin Gould and it's inspiring to see how quickly he has climbed the rankings in the past few years. I'm now working hard to try to get through Q School and hopefully I can then hit the tour running."
Sutton, who lives in Clogherhead and works as a Sales Executive for Kraft Foods, is also hungry for success in Q School. He said: "I played really well in the SnookerBacker event and it was great to get the job done by reaching the final.
"Q School is a fantastic opportunity and it will be the first time I have played in it. I'll be doing a lot of practice before then and hopefully I will be match sharp. My friend David Morris came through it last year and he has progressed well. Plus it's a two -year exemption this time which is even better."
Ball by ball scoring and results from tournaments