You can find geometry for the Speedster you have here:
http://www.scott-sports.com/us_en/pr...2/55736/218120

You can find the geometry for the Contessa CR1 Pro here:
http://www.scott-sports.com/us_en/pr...4/55941/218001

At a quick glance:

Top tube length:
Contessa CR1 pro in size 54: 54.5 cm
Speedster S40 in Size 52: 53 cm

Seat tube angle:
Contessa CR1 pro, size 54: 74 deg
Speedster S40, size 52: 74.5 deg

Seat tube length (c-c):
Contessa CR1 pro, 54: 48 cm
Speedster S40, 52: 46 cm

Standover height:
Contessa CR1 pro, 54: 77.5
Speedster S40, 52: 75.3 cm


The Contessa CR1 Pro in 54 **is** a bigger bike than the Speedster you have. I didn't compare the 52 to the 52 directly, but it looks like the sizing between the two models is actually pretty similar.