Development

I actually talked about this in many forums out there including the Sprint forum saying HSDPA VS EV-DO. Please go look. WCDMA uses the similar processes that CDMA does. Some differences. Radio channels are 5 MHz with WCDMA but with 1.25 MHz with CDMA. Others are more technical. They both allow for more users to be on the network and higher bandwidth and speeds.

Speeds;

HSPA;
High speed downlink Packet access or HSPDA
Downlink up to 14.4mb/s.
HSUPA (high speed uplnk packet access:
Uplink up to 5.76 mb/s.
Next generation or evolved HSPA:
42mb/s down, 11mb/s up.
Next generation or HSOPA which is High Speed OFDM:
100mb/s down, 50mb/s up.

CDMA
EV-DO REV O: 2.4mb/s down. 300k-700k up.
REV A; 3.1mb/s down. 1.8mb/s up.
REV B; 46mb/s down. 27mb/s up.
REV C; keeps going up.
UMB; 288mb/s down. 75mb/s up.