hey cliff,
here are the links and you can compare them:
Synology:
http://www.synology.com/us/products/compare_spec.php
QNAP:
http://www.qnap.com/images/products/comparison/Comparison_NAS.html
i noticed a few differences, the QNAP has 512 ram vs Synology 256, the QNAP has hot swappable drives, the power consumption is better on the QNAP, QNAP can do EXT3 and EXT4 if you want ...
i have heard the photostation on the Synology is better but QNAP just released a new firmware that includes one like Synology's so they are getting there, just a few bugs in it so should be fixed next firmware release but then again you aren't looking for that feature ..
i will let you find anymore if you want to ...