Depends on what you want...is yours a Tribute or US model? I have played a handful of both, and the US made ones have been consistently solid instruments. The Tributes are also great for the price- far better feeling to me than an MIM Fender to me. That said, you may be looking for something else- an SB-2 is defintely nothing like a Stingray! There's also nothing saying that a US G&L should be "better" than a comparable US Fender- they are different animals, especially tonally, and cost about the same too.
For my needs at the time (pretty "in your face" and fast/intricate music), my old US SB-2 was far superior to any of the many Fenders I auditioned in stores for years, but it is a bass that takes some getting used to if you are used to Fenders.
No tone control means you have to learn to use different balances of the volume controls to find different tonal nuances (or add a tone control, as I eventually did). The bridge pickup isn't really meant to stand on its own so much as to change the color of the P pickup. The stock tone is much clearer and more aggressive to my ears than a Fender P-bass, and maybe thats just not the tone you're looking for? By turning down the P pickup volume about 1/4 of the way and turning the bridge pickup most of the way off, you can get some more "traditional" P-bass tones if that's what you're after.
The SB-2 also comes stock with a fairly skinny neck- mine had a very comfortable and ridiculously easy-playing Jazz profile. Probably the nicest feeling Jazz-ish neck I've ever had the pleasure of owning.
Also (of less importance in my experience than the tone and playability)- The bridge is countersunk into the body and has a saddle-lock function to get maximum body coupling, which is a feature never found on a Fender.
I really miss my SB-2, if you couldn't tell!
Karl