I have owned the Frederick Akesson SC245 which I think is one of the top-of-the-line SE models, I put Seymour Duncan Alnico II Pros, in it.
Spectacular guitar, Probably better than 75% of the Les Paul's, Thunderous tight power chords. I have a PRS 594, double cut. they are extremely similar guitars for sure. the ebony fretboard on the Akesson definitely was more percussive string attack. so the guitars are tonally different from that aspect, That's why I let the guitar go I just didn't quite bond with the ebony tone, as well as no coil split, but I did keep it in the family I gave it to my son. I really really like the flexibility of the 594 coil splitting, Really Really really, nice feature For me, I use it constantly. But you do have to prioritize what is the most value to you. The other minor drawback for the 594 is the LT Bridge pickup, for a good percentage of the players, is not hot enough, I put a Seymour Duncan Pearly Gates in the bridge of my 594,I feel the guitar is perfect now, The range of music that can be covered is incredible. The neck pickup LT is superb. A 57/08 In the bridge of the 594 is also unbelievably excellent. so if you want to play classic hard rock the LT bridge does not quite make it there for about 33% of the players,(However it is very close and very good), For blues the LT is everything you could dream of. you can solve it with perfect booster pedal, some have suggested. so I would say the guitars are very similar tonally, if they have the same electronics, That's probably the major differences is they come with a lot of different configurations,
so I would focus on,
1. the music you play, choosing the pickup first. 5708 5815 5815 LT
2. your desire or lack for coil splitting, I think you can find SC245 with coil splits.
3. Finally the money, which to me is less important if I find the guitar that has the set up, Or configuration in a PRS, and the attractive looks, just buy it, You know that you won't regret it three months from now an extra $200 or $500 is meaningless, By the time September rolls around.
As you know they're both really excellent, it's a good problem to have, no matter which one you buy your likely to be satisfied.