Truthfully, most "factory" springs already ARE Wolff Springs.
It's like a best kept secret.
If your firearm is functioning perfectly with the spring weight you're using now then I would stay with the same spring weight unless your brass is being kicked out into the Ionosphere then you might want to move up in spring weight.
Remember that changing your recoil spring power (in either direction) affects your timing and your force of feed so if it ain't broke don't fix it. Unless you just want to experiment then buy both weights and play....but, for carry I would stay with the same spring weight that is already working perfectly for you. Just my opinion.