Short answer - yes.
Long answer: The KTA- series of Kingston RAM are made for Macs, they have the SPD settings correctly set. Although the Mini technically requries only PC2700 (333 MHz) DDR RAM, you can use PC3200 (400 MHz) in it just fine.
Kingston RAM with part numbers KVR- are their generic ValueRAM series, and are not tested for Mac compatibility.
Thanks
Trevor
CanadaRAM.com