I used to play the Rebel Yell bridge in my Les Paul Custom (first with the matching RY neck, later with the HD neck) and was quite happy with it. However, when I replaced the Cold Sweat bridge in the Soloist type guitar with a VHII bridge I just had to try the CS bridge in the LPC.
How does it sound compared to the RY bridge?
Output: about the same, CS a tiny bit more.
Bass: CS has more bottom end but it stays tight no matter how much gain you throw at it. Insofar BKP's description is accurate.
Midrange: To my ears the CS has a flatter midrange which makes it sound a bit darker compared to the RY. This may be what the website description calls "scooped". The RY has noticeably more center and high mids.
Highs: CS appears to have more top end bite than the RY - not as much as the VHII bridge though.
Funnily though the RY bridge appears to be brighter overall than the CS bridge due to the different midrange emphasis, even though the top end is smoother than the CS's. The LPC is now a bit darker on the bridge pickup, with more bass punch and more high end bite. The Sykes 87 monster riff tone is now mine with this guitar - even though I cannot play like the man. The RY did a bit better at the Ozzy tones and I feel it is generally more versatile than the CS but for the Sykes tone the CS is a sure step in this direction. Great pickup as well.
Cheers Stephan