If you only have the 2 basses, I recommend you not sell the Squier. If anthing ever happens to your Sterling you'll be more heartbroken than you can ever imagine.Personally I have found a combo of bass, strings and amp that I really, really like. I am not a professional musician, and my budget is limited, so I am really happy with my:
Sterling by MusicMan Ray34 loaded with d'Addario Chromes into a MarkBass F1 into a Kustom Deep End 210 + 115 stack. (I actually had a new cab stack on backorder, but when I tested this bass with these strings, the pieces fell nicely into place.) I am really happy wth my sound now. My old favourite, a Squier Precision Vintage Modified PJ, also with Chromes, is suddenly in danger of being sold because it gets so little playing time.
Share the love, dilute the grief.