My technique is pretty clean for the most part, but I don't have super chops. I like a very open sound with extended highs so I can hear the nuances in my playing, but I don't typically want excessive clank and fret rattle on every note. IMHO there's a difference between a sound and setup that is revealing and responsive versus one that make you play bad...to some degree it's genre specific; sometimes a lot of clank and fret rattle is exactly what you need.
My opinion is you should use a sound that you like, so you will be more inspired to practice. I am also an advocate of practicing like you perform...but some concessions are necessary, because you can dial in a really nice tone when you are playing alone in your room that typically won't work on the bandstand. I usually add a lot of mids and highs when I am performing versus practicing alone.
Probably one of the most frustrating things about performance is it is difficult to hear and get a good tone. Maybe practicing like you perform should entail practicing in a way where you can't hear as well as you like. Some players practice without plugging in. I have always thought this is a bit ridiculous, but perhaps it simulates the performance experience better where you have to play by feel more than sound. If this is your approach, you probably feel inspired and excited when you perform and can actually hear the tone of your bass coming through the amp. All of the players I have seen use this technique really attack the strings though, and this is not my style. I use a relatively light touch overall, but vary my attack from soft to aggressive as required by the music...again some of this can be genre specific.
Ultimately each of us are different, so you have to find your own path.