754 vs 478

I have two machines, several generations old.  One is a Skt 478 Pentium 4 HT 2.6GHz.  The other is a Skt 754 Sempron 3200+-ish and I'm thinking about dropping a 3200+ Athlon64 in it.  Assuming the same 7300GT and 2GB of DDR3200 memory are in the box, which machine should I keep?

well the athlon 64 completely stomped the Pentium 4 at that time, so SKT754

I agree, keep the Sempron.