10-100Mbps ethenet cards. Differnce in CPU usage?

[AmigaMance]

Hi.
 I have only used a 100Mbps ethernet to PCMCIA card in my Amiga 1200 and i can't make the comparison myself. My internet connection is below 10Mbps. I think i read somewhere that 100Mbps cards draw less CPU than 10 ones, at the same transfer rate. Does anyone know for sure if this is true?

[AmigaMance]

@ferix
 But, does the outdated PCMCIA interface of a Amiga 1200 take advantage of this enhanced design?