Generic answer ahead:
Depends on what you want.
One definite difference between the two is the tonality due to the different scale lengths. The Les Paul has a scale of 24.75" giving it a slightly warmer tone where the PRS has a scale of 25". For comparison, a Fender has a even brighter tonality with a scale of 25.5". Of course tone is also affected by wood, pickups, etc. This scale length difference also affects sustain, playability, and feel.
"Better Value?" I dunno. I've heard the same shit recently at a local shop. Let's see:
I can get a LP Studio for under $1k
I can get a comparable PRS such as
a CE24 for $1.5k
I can get a LP Custom for around $2.3k and up
I can get other PRS's for that price and up
I'm not too sure what you would call the best value there depending on hardware, appearance, tone, playability, etc.
In fact, I was looking at a Studio and the shop mentioned looking into a PRS. Seems that the PRS is a better value than both a more expensive LP and a less expensive LP. (Sounds more like the PRS has a better profit margin).
Play them both. With and without an amp. Determine what you prefer based on sound, playability, appearance, etc. Both the LPs and the PRS's are great guitars.
Matt