No, N900 is significantly faster. Nokia has used two different 3G-radio chips lately. The older one "only" supports up to 3.6 Mbps DL speed, while it completely lacks UL. The newer chip supports faster speeds, namely 10.2 Mbps DL and 2.0 Mbps UL.

Nokia phones that use the newer chip from 2009:
- All budget S60v3 devices from 2009, besides those with hardware keyboards (to not compete against the N97) [5630XM, 6710N, 6720c]
- All Eseries devices from 2009 [E72, E52, E55]
- All Maemo devices from 2009 [N900]

Nokia phones that use the older chip from 2007:
- All S60v3 Nseries devices [including N95, N95 8GB, N82, N96, N86 8MP]
- All older bugdet S60v3 devices (from 2008) [including 5320XM, 6210N, 6220c]
- All older Eseries device (from 2008 and earlier) [including E71]
- All S60v5 devices from any date [N97, N97 mini, X6, 5800XM, 5800NE, 5530XM, 5230]
- All budget S60v3 devices with hardware keyboards [including 5730XM, 6760s]

Note: There is a correlation between the 3G-radio chip inside the phone and the phone's CPU. It seems that only ARM Cortex-A8 (or above) and ARM11 600 MHz (or higher clock) are powerful enough to be able to handle the new chip.