Rapha, nice but a bit pricey?

Elaborate, from what I've read, Softshell is good for the extreme winter and for general riding (especially when you're just taking it easy), whether the PTJ from the sound of it are great for club ride and long commute.

Question that have been asked many time, but seeing that the PTJ is those race fit clothing, I assumed I need to size up from the Softshell, right?

I'd say that's a fair summation of the two jackets, ed.

As for fit, you might find you're alright with the same size as the softshell. I am. But, they definitely differ in cut and purpose. I'm on the cusp of sizes with their l/s and jackets, making sure I have enough in arm length without getting flappy. I settled with the larger size with the ptj. Where as I could get away with the fit of a smaller softshell, I probably couldn't with the ptj.
Doesn't really help, other than maybe confirming trying both sizes is ideally the best option...which we knew anyway. I'd get my coat if I could only decide which one.