@ejlif,
The latest Rossini transport is a hefty OEM tray mechanism built by Denon that plays both CD and SACD. The Pro-Ject CD BOX RS2 is top loader CD (No SACD but plays the hybrid CD layer) utilizes the Stream Unlimited CD Pro-8 drive.
The Rossini has an internal chassis linear power supply. The Pro-Ject transport has a supplied wall wart and a linear power supply is optional. The Pro-Ject even with an optional linear power supply is much less costly. Keep in mind despite the lower cost it was selected as the CD drive mechanism for top model Gryphon Ethos player and Accustic Arts Drive II transport.
How important is SACD playing capability to you? Otherwise in terms of Redbook CD I just can't see either as less than excellent solutions. You're in a no lose situation in my opinion.
Charles