Austin reminds me of poor old Jarrod Sammut. Extremely energetic, willing to jump in whenever and wherever anything is on, but ultimately an opportunistic player that can look brilliant against very poor defence but has absolutely zero against structured defence.
Sezer on the other hand I see as a more skilled John Sutton - kind of too big to be a traditional half but not aggressive enough or having the motor required to play in the back row. On the plus side has a pretty good temperament and seems just as effective against the better teams than the poorer ones. But he's no halfback, no way. He might be able to lead the team around but he doesn't he's more likely to assist a line break through brute strength and popping an offload than clever footwork or the will-he-run-or-pass-it playmaking staple.
For mine, they're both sixes. Sezer being the bigger, hard-running lock/half of old, and Austin the flightly, call-the-ball-if-you-see-something second receiver. Austin needs a Hodkinson-type halfback (which is where I agree with the comparisons to Grub Reynolds), whereas Sezer could do with a DCE-type. Yeah, I think Sezer would have gone better had he stayed on the coast.