If you compare them both, you will find that a lot of the commentary in the Ignatius is excellent… but it seems “borrowed” or similar to the Navarre.
The Navarre is more expensive, and you may never use or need the Latin… but the commentary is good and solid, and the extra stuff - the articles, introductions, background info etc - that is found in some of the volumes is really great.
Ignatius for economy
Navarre for commentary
Haydock for overall best. haydock1859.tripod.com/
DISCLAIMER: Catholic Answers has turned over the archive to Catholic-Questions.org and no longer owns, manages, or moderates the forums. For additional apologetics resources please visit www.catholic.com.