Err no an xlr mic into a sound card is going to be better.
In nearly every case, a dedicated usb interface is going to have better quality ADC and mic preamps. High-quality sound cards are not prioritized by consumers, so they remain rather poor quality in most laptops and pcs. Even something like a focusrite scarlett is going to improve the signal chain immensely (plus you get the added bonus of a decent DAC as well).
I did of course mean a real external sound card.
And a usb mic is not going to have as good a mic capsule at the same price point which was my point.