Yep, just downloaded fruittool's version as well to compare. I used the exact same launch settings as I posted above, and it is also about 40 kHash lower, or ~ 180 kHash/sec in my case. I also cross checked what the console was reporting with the statistics on my pool, and the results were consistent; lower with the 64 bit clients.
Back to using the 32 bit version for now and 220 kHash/sec.
Did you try the -H 1 switch? Assuming you have a dual core or more. The 64 bit build seems to use more cpu and may benefit from it more or less depending on cpu speed.