The Saab with the 2.3T aero hot spec is amazing value goes well and can be tuned a fair bit.
The Volvo is going to be older or higher miles, is much smaller and the V50 does not feel like it's built like a tank feels lower quality than and 9-5.
Both feel quite numb to drive and roll about on the corners if pushed. We had an 07 V50 D5 last week and I was quite impressed with it but I would take a 2.3t aero over a T5 v70.