Which of these testing mic pre-amps is better........

[Gavinator68]

If you please..............which of these mic pre-amps is better for my use in testing loudspeakers with a panasonic capsule mic?

http://eel.st.usm.edu/~jmneal/preamp1.htm

OR

http://www.mitedu.freeserve.co.uk/Circuits/Audio/ecmmic.html

Thanks for the input,

Gav