I'd say they are comparable.
I can't speak to the ratchets, but the few sockets, extensions, and the 1/4" handle I have are very well finished and every bit as sturdy as those in the 1/4" Kobalt set I have.
They kind have become my go to because the store is convenient to me, has good sales, and I like that they have an assortment of individual sockets, extensions, etc. that I can purchase as needed to augment the several sets that I have.
They have a much more comprehensive offering of separate pieces than Lowes offers with separate Kobalt pieces, at least in my area.
I'm not going to say that they are God's gift to tools, but they offer solid pieces that are a very good value.