Are you in Aus? Is this the Crow Cams cam? I ran the specs by the 22R experts on the Old Celica Club mailing list, and the consensus was that it was probably no better or worse than stock.
Unfortunatley, there isn't much support for the 22R in Aus. Heaps of aftermarket in the USD tho (including cams - the 'stage 2' trd one or equivalent is only recommeneded after port work IIRC). I suggest subscribign to the email mailing list at www.celicas.org (not the online forum, the mailing list) and ask some questions.